括号12点五加上二点五括号乘以零点四乘以零点八怎么简便运算

2025-04-14 11:45:01
推荐回答(1个)
回答(1):

(12.5+2.5)×0.4×0.8
=15×0.4×0.8
=6×0.8
=4.8