13.8*7.6-(4.29+3.31)*8.8巧算

2025-06-26 12:39:11
推荐回答(1个)
回答1:

13.8*7.6-(4.29+3.31)*8.8
=13.8*7.6-7.6*8.8
=7.6*(13.8-6.8)
=7.6*7
=53.2