Finding Sum with Rounding
Each worksheet has 20 problems using rounding to find the sum mentally.
Student Objectives
- Practice rounding numbers to a nearby ten or hundred to make them easier to add in your head.
- Learn to spot “friendly” numbers you can make by rounding before you add.
- Estimate the total of two numbers quickly without doing exact pencil-and-paper addition.
- Decide whether to round up or round down by looking at the digit in the next place.
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