11分之24乘(5分之3乘12分之7加11分之2乘15分之11) 【2又5分之3加(5又5分之2减2分之1)除以7】乘11分之1
请使用简便计算
人气:204 ℃ 时间:2019-10-09 03:08:09
解答
24/11×(3/5×7/12+2/11×11/15)
=24/11×3/5×7/12+24/11×2/11×11/15
=42/55+16/55
=58/55
=1又3/55
[2又3/5+(5又2/5-1/2)÷7]×1/11
=[13/5+7/10]×1/11
=33/10×1/11
=3/10
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