Question

-4.2+5.7-8.4+10 计算。要过程

Answer 1

-4.2+5.7-8.4+10 = (5.7-4.2) + (10-8.4) = 1.5 + 1.6 = 3.1

追问

在哪步骤划线？

追答

-4.2 + 5.7 = 5.7 - 4.2 communicative

Answer 2

-4/1+5/6+2/3-1/2

Answer 3

-4/1+6/5+3/2-2/1