Term
| Commutative (order) Property of Addition |
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Definition
Add the numbers in any order and the sum will be the same. Ex. 3 + 4 = 4 + 3 |
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Term
| Associative (grouping) Property of Addition |
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Definition
group addends in any way and the sum will be the same. Ex. 3 + ( 1 + 2 ) = 6 ( 3 + 1) + 2 = 6 |
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Term
| Identity (zero) Property of Addition |
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Definition
sum of any number and zero is that same number. Ex. 6 + 0 = 6 |
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Term
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Definition
| Answer to an addition problem. |
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Term
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Definition
| When you add numbers together to give a sum. |
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Term
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Definition
| Answer to a subtraction problem. |
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Term
| Fact Family - Ex. 3, 9, 12 |
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Definition
3 + 9 = 12 12 - 9 = 3 9 + 3 = 12 12 - 3 = 9 |
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Term
| Find the rule: Ex. Rule is ADD 7 |
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Definition
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Term
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Definition
1. Rounding to the nearest 10 or 100 Ex. 212 to 210 +177 to 180 390 212 to 200 +177 to 200 400 2. Front end estimation-use the front digit of each number and zeros for the rest. Ex. 356 to 300 +423 to 400 700 3. Compatible numbers-numbers tat are close, but easy to add. Ex. 356 to 350 +423 to 420 770 |
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