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3.86×0.25+6.14÷4 如何简便运算?
人气:292 ℃ 时间:2020-04-11 04:02:03
解答
3.86×0.25+6.14÷4
=3.86x0.25+6.14x0.25
=0.25x(3.86+6.14)
=0.25x10=2.5
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