分数乘除法简便运算15×1/6+13/21×14+5/6×15+13/21×72356÷2356又2356/23572201又7/48÷55180-(1/2+3/5+2/3+5/7)

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分数乘除法简便运算15×1/6+13/21×14+5/6×15+13/21×72356÷2356又2356/23572201又7/48÷55180-(1/2+3/5+2/3+5/7)
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分数乘除法简便运算15×1/6+13/21×14+5/6×15+13/21×72356÷2356又2356/23572201又7/48÷55180-(1/2+3/5+2/3+5/7)
分数乘除法简便运算
15×1/6+13/21×14+5/6×15+13/21×7
2356÷2356又2356/2357
2201又7/48÷55
180-(1/2+3/5+2/3+5/7)

分数乘除法简便运算15×1/6+13/21×14+5/6×15+13/21×72356÷2356又2356/23572201又7/48÷55180-(1/2+3/5+2/3+5/7)
15×1/6+13/21×14+5/6×15+13/21×7
=15×(1/6+5/6)+13/21×(14+7)
=15×1+13/21×21
=15+13
=28
2356÷2356又2356/2357
=2356÷2356×(1+1/2357)
=1×2358/2357
=2358/2357
2201又7/48÷55
=(2200+55/48)÷55
=2200÷55+55/48÷55
=40+1/48
=40又1/48
180-(1/2+3/5+2/3+5/7)
这题没有简便方法