6.8-1.8×0.4-0.28的简便计算怎么写?

2025-05-19 14:14:00
推荐回答(1个)
回答(1):

6.8-1.8×0.4-0.28
=6.8-1.8×0.4-0.4x0.7
=6.8-0.4x(1.8+0.7)
=6.8-0.4x2.5
=6.8-1
=5.8