math
posted by Faye .
18 Estimate 8128 /18 by first rounding each number so that it has only nonzero digit.
20. Find the digits in the tens place, in the tenths place, and in the ten thousandths place for the following number. 465.2587
21. Round 0.681 to the nearest tenth.
22. Estimate 17.64+9.213 by first rounding each number to the nearest tenth.

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