十四点五加七点六五乘四加25点5加2点35乘4加40的简便算法

2025-03-10 14:47:15
推荐回答(1个)
回答1:

14.5+7.65*4+25.5+2.35*4+40
=14.5+7.65*4+25.5+2.35*4+10*4
=(14.5+25.5)+(7.65+2.35+10)*4
=(7.65+2.35+10+10)*4
=30*4
=120