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简便计算:(2-0.125)乘以8= 360-60除以0.4=
人气:298 ℃ 时间:2019-11-09 12:30:36
解答
(2-0.125)×8
=(2-1/8×8
=2×8-1/8×8
=16-1
=15
360-60÷0.4
=360-60÷2/5
=360-60×5/2
=360-150
=210
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