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10 Cards in this Set
- Front
- Back
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Associative Property of Addition
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The property which states that the grouping of the addends does not change the sum.
Ex: (4 + 5)+ 2 = 4 + (5 + 2) |
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Commutative Property of Addition
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The property that states that the order in which two numbers are added does not change the sum.
Ex: 12 + 15 = 15 + 12 |
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decimal point
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A period separating the ones and the tenths in a number.
Ex: 0.8 or $3.77 |
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estimate
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A number close to an exact value; an estimate indicates about how much.
Ex: 47 + 22(estimate 50 + 20) about 70. |
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Identity Property of Addition
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If you add zero to a number, the sum is the same as the given number.
Ex: 3 + 0 = 3 |
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regroup
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To use place value to exchange equal amounts when renaming a number.
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dollar sign
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($)
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cents sign
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(¢)
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sum
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The answer to an addition problem.
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rounding
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To change the value of a number to one that is easier to work with. To find the nearest value of a number based on a given place value. Example: 27 rounded to the nearest ten is 30.
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