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Topic 3
Add with Sums to 100
Term | Definition |
---|---|
tens | the digit that shows how many groups of 10 are in a number |
ones | the digit that shows how many ones in a number |
open number line | a tool that can help you add and subtract. It can begin at any number. |
break apart | putting a number into its place value parts |
compensation | a math strategy you can use when adding or subtracting to add or subtract numbers more easily |
round | a number to the nearest ten, you can use the ten that is closest number |
estimate | make a guess to find the sums or differences of numbers, you can round each number to the nearest ten |