0.99×9+0.99简便计算

2024-12-19 19:05:48
推荐回答(2个)
回答1:

0.99x9+0.99
=0.99x9+0.99x1
=0.99x(9+1)
=0.99x10
=9.9

回答2:

0.99*9+0.99=0.99*(9+1)=0.99*10=9.9