1.9×0.99+0.19怎么简便

2025-04-09 00:25:01
推荐回答(2个)
回答1:

1.9×0.99+0.19

解:原式=1.9x0.99+1.9x0.1
=1.9x(0.99+0.1)
=1.9x1.09
=2.071
答:答案是2.071。

回答2:

1.9x0.99+0.19
=1.9x(1-0.01)+0.19
=1.9-1.9x0.01+0.19
=1.9+0.019+0.19
=1.919-0.19
=1.729