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114 Cards in this Set
- Front
- Back
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Read this number:
0.2 |
2 tenths
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Read this number:
1.04 |
1 and 4 hundredths
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Read this number:
17. 008 |
17 and 8 thousandths
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List the place value of the first three digits after a decimal point.
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tenths, hundredths, thousandths
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How many decimal places do you need to have a number in the tenths?
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1
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How many decimal places do you need to have a number in the thousandths?
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3
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How many decimal places do you need to have a number in the hundredths?
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2
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Steps to rounding?
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1. Circle the digit in the place you are rounding to
2. Underline the digit to the right. 3. Ask yourself if the underlined digit is 5 or greater 4. If it's 5 or greater, round the circled digit up. If it's less than 5 the circled digit stays the same |
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How to compare or order decimals?
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1. Line up the decimal points
2. Fill in holes with zeros 3. Compare from left to right |
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What is a sum?
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Answer to an addition problem
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What is a product?
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Answer to a multiplication problem
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What is a factor?
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The numbers you multiply together to get a product
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What do you do with the decimals in an addition or subtraction problem?
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Line them up!
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Do you line up decimals in a multiplication problem?
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No, but if they happen to line up it's OK.
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Where do you put the decimal in the answer to a multiplication problem?
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Count the number of decimal places in the problem, then move from right to left that many number of spaces in the answer.
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Quotient
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Answer to a division problem
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Divisor
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Number on the outside of the division sign. The number being "divided into" another number
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Dividend
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Number on the inside of the division sign. The number being divided.
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What is the first thing to do when you have a divsion problem with a decimal in the dividend?
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Move the decimal straight up to the quotient. Divide the numbers ignoring the decimal.
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Steps to division
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Divide, Multiply, Subtract, Compare, Bring Down
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What does the line in a fraction mean?
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Divide
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How do you divide a larger number into a smaller one?
ex: 4/5 |
Add a decimal and zeroes after the four. Bring the decimal straight up to the quotient and divide.
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How do you simplify a fraction?
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Divide the numerator and denominator by the same number until you cannot divide any more.
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Numerator
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Top number in a fraction
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Denominator
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Bottom number in a fraction
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How do you change an improper fraction into a mixed number? ex: 13/5
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Divide. 13 divided by 5 = 2, there is a remainder of 3. The 2 is the whole number, 3 is the numerator, and the denominator stays the same. 2 3/5
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Mixed number or Mixed numeral
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A whole number and a fraction
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Improper fraction
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The numerator is larger than the denominator
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How do you change a mixed number to an improper fraction? ex: 2 6/7
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Muliply the denominator and the whole number then add the numerator. Denominator stays the same. 2 6/7 = 7x2+6 over 7
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How do you add or subtract fractions with unlike denominators?
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Find the lowest common denominator, then make equivalent fractions
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Perimeter
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distance AROUND something
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Area
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number of SQUARE units needed to COVER a surface
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Volume
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The amount of space inside an object
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Formula for Perimeter
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P= side+side+side+side
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Formula for Area
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A= Length x Width
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Formula for Volume
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V= Length x Width x Height
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Units for Perimeter if measured in centimeters
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centimeters
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Units for Area if measured in centimeters
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centimeters squared
(centimeters with a little 2) |
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Units for Volume if measure in centimeters
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centimeters cubed
(centimeter with a little 3) |
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How do you find area of a triangle?
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Area of triangle = length x width divided by 2
(same as base x height divided by 2) |
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Circumference
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distance around a circle
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Chord
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a line segment joining any two points on a circle
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diameter
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a chord that goes through the center of a circle
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radius
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Half of a diameter.
A line segment from the center of a circle to a point on the circle. |
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Acute angle
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less than 90 degrees
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Right angle
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90 degrees
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Obtuse angle
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more than 90 degrees, but less than 180 degrees
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Straight angle
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180 degrees. A straight line.
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Right Triangle
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Has 1 right angle
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Acute Triangle
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Has 3 acute angles
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What is a quadrilateral?
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A closed four-sided figure
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Parallelogram
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quadrilateral with opposite sides the same length and parallel
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Rectangle
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quadrilateral with four right angles
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Rhombus
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quadrilateral with all sides the same length and parallel
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Square
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quadrilateral with four right angles and all sides the same length
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Trapezoid
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quadrilateral with EXACTLY one pair of parallel sides
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Kite
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quadrilateral with tow pairs of DISTINCT ADJACENT sides that are equal
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Adjacent
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side-by-side
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a rectangle is also a
(2 answers) |
quadrilateral
parallelogram |
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a parallelogram is also a
(1 answer) |
quadrilateral
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a rhombus is also a
(2 answers) |
quadrilateral
parallelogram |
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a square is also a
(4 answers) |
quadrilateral
parallelogram rectangle rhombus |
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congruent
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the same, equal
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noncongruent
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not the same
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similar figures
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have the same shape, but MAY or MAY NOT have the same size
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If two figures are congruent, they are also
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similar
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To subdivide a shape, you
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break it into two or more different shapes
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A figure has symmetry if
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you can fold it so that it has two parts that match exactly
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A regular polygon (shape with equal length sides) has ______ lines of symmetry
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As many lines of symmetry as it has sides
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tranSLation
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When a figure SLides
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reFLection
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When a figure FLips, or a mirror image
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roTation
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When a figure Turns around a point
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face
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one side of a 3-D figure
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vertex
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the point on a 3D figure where 3 or more faces intersect
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cylinder (definition)
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3D figure with 2 parallel and congruent circles a s bases, on curved surface, two curved edges and NO VERTEX
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Cylinder (example)
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soup can
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Cone (definition)
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3D figure with one curved surface, one flat circular surface, one curved edge and on vertex
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Cube (definiton)
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3D shape with six congruent square faces
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Cube (example)
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a die (pair of dice)
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Square Pyramid (definition)
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3D figure whose base is a square and whose faces are triangles that share a common vertex
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Square Pyramid (example)
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Egyptian Pyramid
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Rectangular Prism (definition)
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3D figure with six rectangular faces
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Rectangular Prism (example)
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shoe box
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Event
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something that may happen
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outcome
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one of the possible events in a probability situation
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sample space
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a list of ALL the possible outcomes of an event
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tree diagram
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the type of chart you draw to show the sample space (all possible combinations or outcomes) of an event
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sample space
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a list of ALL the possible outcomes of an event
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tree diagram
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the type of chart you draw to show the sample space (all possible combinations or outcomes) of an event
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To turn a fraction into a decimal
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Divide the numerator by denominator. Add a decimal and zeros to continue dividing.
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The first step to making a stem-and-leaf plot is to...
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put the numbers in order from least to greatest
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Mean
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Average
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To find the mean...
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1. Add up all the numbers
2. Divide by the number of addends. |
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To remember what mean is...
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My teacher is so MEAN to make us ADD up all these numbers and then DIVIDE!
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Median
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Middle number
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How to remember median means middle
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the median of the highway is in the middle of the 4 lanes
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How to find median
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1. Put numbers in order from least to greatest
2. Mark off numbers at either end until you get to the middle 3. If there are 2 numbers in the middle, find their mean |
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MOde
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Number that occurs the MOst
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Range
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Difference between the largest number and the smallest number
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How to find range
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Subtract the smallest number from the largest number
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Interval of a graph
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What the graph is "counting by" on the y axis
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x axis of a graph
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bottom line, the horizontal axis
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y axis of a graph
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line on the side, the vertical axis
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horizontal
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straight across
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vertical
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straight up and down
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To plot points on a coordinate plane
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Go OVER, then UP
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Variable
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a symbol that represents a number in a math expression or equation
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Expression
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A fragment of a math sentence. It DOES NOT have an =
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Equation
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A complete math sentence. It HAS an =
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Evaluate means
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SOLVE
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What does the fraction line mean?
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Divide
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To put a set of fractions and decimals in order
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Change them all to the same form... all decimals or all fractions
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To change a decimal to a fraction
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1. Listen to how the decimal is read aloud.
2. Write this as a fraction 3. Simplify |
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To change a fraction to a decimal
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Divide the numerator by denominator. Add a decimal and zeros to continue dividing.
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