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0.84×1.7÷0.07(简便计算)
人气:367 ℃ 时间:2020-04-10 09:53:03
解答
0.84×1.7÷0.07
=(0.84÷0.07)×1.7
=(84÷7)×1.7
=12×1.7
=(10+2)×1.7
=10×1.7+2×1.7
=17+3.4
=20.4
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