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数学
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0.8×100.1简便计算 (1.25―0.125)×8简便计算 15÷0.125简便计算
人气:324 ℃ 时间:2019-11-10 20:09:11
解答
0.8×100.1
=0.8×(100+0.1)
=0.8×100+0.8×0.1
=80+0.08
=80.08
(1.25-0.125)×8
=1.25×8-0.125×8
=10-1
=9
15÷0.125
=15÷1/8
=15×8
=120
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