9.9乘9.9加0.99 应该怎么算

2024-11-28 10:19:08
推荐回答(1个)
回答1:

(10-0.1)x(10-0.1)+0.99
=10x10-2x10x0.1+0.1x0.1+0.99
=100-2+1
=99