Question

(1 3/4-7/8-7/12)/(-7/8)+(-7/8)/(1 3/4-7/8-7/12 简便方法

Answer 1

你好！

数学之美团为你解答

1又3/4 - 7/8 - 7/12
= 7/4 - 7/8 - 7/12
= 7 * (1/4 - 1/8 - 1/12 )
= 7*( 6/24 - 3/24 - 2/24)
= 7/24

原式 = (7/24) ÷ (-7/8) + (-7/8) ÷ (7/24)
= - 1/3 + (-3)
= - 3又1/3

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Answer 2

=[（7/4-7/8-7/12）×24]÷[（-7/8）×24]+[（-7/8）×24]÷[（7/4-7/8-7/12）×24]
=[42-21-14]÷[-21]+[-21]÷[42-21-14]
=-1/3-3
=-3又1/3

或通过观察题目发现，本题是两个互为倒数相加
先算出加号左边的数为-1/3
然后计算（-1/3）+（-3）=-3又1/3