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9 Cards in this Set
- Front
- Back
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addend
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any one of a set of numbers to be added
Ex. 22+51 |
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align
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to bring into a straight line, line up
Ex. 562+135 -> 562 +135 |
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estimate
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to find an answer that is close to the exact answer, often based on rounding
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mental math
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a strategy used when computations can be solved in the mind
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missing addend
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an unknown addend in addition
Ex. 8+__ =15 |
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regroup
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rearrange the formation of a group- used when trading or carrying in addition and subtraction. Ex. 1
47 +25 2 |
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rounding
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* to approximate a number by replacing it with a number expressed in tens, hundreds, thousands, and so on.
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sum
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the answer in addition
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tens
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* something numbered ten or having ten units
* the place in between the ones and hundreds Ex. 893 |
