So: when the first digit removed is 5 or more, increase the last digit remaining by 1. The next digit is "6" which is 5 or more, so increase the "8" by 1 to "9" so the answer will be 90 (86 gets "rounded up"). The next digit is "4" which is less than 5, so no change is needed to "7", so the answer will be 70 (74 gets "rounded down").Įxample: Round 86 to the nearest 10: We want to keep the "8". ![]()
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