18⼀11+27⼀11+8⼀7简便方法

2025-01-02 18:43:17
推荐回答(2个)
回答1:

直接计算:
18/11+27/11+8/7
=(18+27)/11+8/7
=45/11+8/7
=(45×7)/77+(8×11)/77
=315/77+88/77
=403/77

回答2:

18/11+27/11+8/7
=45/11+8/7
=4又1/11+1又1/7
=4又7/77+1又11/77
=5又18/77