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15 Cards in this Set
- Front
- Back
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variable
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a letter used to represent a number
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zero property of additon
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if you add zero to any number the sum is that number 7+0=7
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parenthesis
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( )
in math means do what is inside these first |
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commutative property of addition
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the quality of additon that states that the order of the addends does not change the sum
3+4=4+3 |
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number sentence
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a statement showing how nbumbers in an operation are related.
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addends
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numbers that you add in addition
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estimate
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adding or subtracting rounded numbers
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sum
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answer in addition
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open sentence
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a number sentence that contains a variable
x+6=10 |
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difference
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answer in subtraction
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rounding
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changing the number to the nearest 10, 100, 1000, etc
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inverse operation
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the opposite operation:
the opposite of addition is subtraction |
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algebra
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an area of math that uses variables or letters to represent numbers
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inverse of addition
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subtraction
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associative property of addition
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the property of addition that states that the way you group the addends does not change the sum
1+(2=3)=(1+2)+3 |
