6.9x1.1_0.69的简便计算?

2024-11-25 16:18:02
推荐回答(1个)
回答1:

6.9x1.1-0.69
=6.9×1.1-6.9×0.1
=6.9×(1.1-0.1)
=6.9×1
=6.9