Question

学霸们帮帮忙，这题怎么简算？

Answer 1

 

追答

求采纳

一定正确的

谢谢啦

Answer 2

=678.32-(100-0.1)
=678.32-100+0.1
=578.32+0.1
=578.42

Answer 3

678.32-99.9
=678.32-100-0.1
=578.32-0.1
=578.22

Answer 4

678.32-100+0.1
＝578.42

追答

靠

Answer 5

把99.9，拆分成100-0.1，相信你已经懂了

Answer 6

678.32-＜99.9+0.1＞