When we’re in a hurry or don’t have a pen and paper, rounding can help us estimate harder arithmetic problems. This skill will help when quickly trying to see if we can afford everything on our grocery list or what this month’s budget adds up to. This is done by rounding to the highest place value we see (356 → 400 and 22.4 → 20). Then, addition and subtraction can be done on these rounded values much more easily. The answer we get won’t be exact, but it will be a good estimate.
Estimating Answers Using Rounding
Practice Problems1. What is the result when front-end rounding is applied to the number \(35,073.290\)?
2. \(26.37 + 61.72 = ?\) (
3. \(739.6 + 479.6 = ?\) (
4. \(6.6 − 2.5 = ?\) (
5. \(39.225 − 13.581 = ?\) (
6. \(3299.06 − 5323.11 = ?\) (
Need More Help?
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