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7 Cards in this Set
- Front
- Back
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Commutative Property
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when adding the order of the number can change but the sum is the same.
3 + 4 = 7 4 + 3 = 7 |
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addend
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a number to be added
3 + 4 = 7 addend addend |
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estimate
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to find an answer that is close to the exact answer
321 + 189 is about 300 + 200 = 500 |
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regroup
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to name a number in a different way
18 ones as 1 ten 8 ones |
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Identity Property
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When one of the two addends is zero, the sum is the same as the other addend.
7 + 0 = 7 |
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pattern
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a series of numbers that follows a rule
3 + 4 = 7 30 + 40 = 70 300 + 400 = 700 |
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Associative Property
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When adding, the grouping of numbers can change but the sum is the same.
3+(4 + 2)=9 (3+4)+2=9 |
