8.9x10.1简便计算等于多少

2025-04-13 19:18:41
推荐回答(1个)
回答1:

8.9x10.1
=(9-0.1)x(10-0.1)
=90-19x0.1+0.01
=91-1.9+0.01
=89.1+0.01
=89.11