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1÷0.25×(1.28÷3.2)用简便方法算
人气:319 ℃ 时间:2020-02-06 01:58:02
解答
1÷0.25×(1.28÷3.2)
=(1.28x1)÷(3.2x0.25)
=1.28÷(0.8x4x0.25)
=1.28÷0.8
=16
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