Question

0.35×2.4-0.4怎么简算？ 320÷1.25÷8怎么简算？

3.6-0.6×2怎么简便运算？ 9.7×99 +9.7怎么简便运算？

Answer 1

解如下图所示：

追问

3.6-0.6×2 可以简便计算吗？

Answer 2

0.35ⅹ2.4-0.4
=0.35ⅹ0.4ⅹ6-0.4ⅹ1
=0.4ⅹ（0.35ⅹ6-1）
=0.4x（2.1-1）
=0.4Ⅹ1.1
=0.44

Answer 3

0.35x2.4-0.4
=0.35x0.4x6-0.4
=0.4x（0.35x6-1）
=0.4x（2.1-1）
=0.4x1.1
=0.44
320÷1.25÷8
=320÷（1.25x8）
=320÷10
=32

Answer 4

0.35×2.4-0.4
=0.7×0.5×4×0.6-0.4
=(0.7×0.6)×(0.5×4)-0.4
=0.42×2-0.4
=0.84-0.4
=0.44
320÷1.25÷8
=320÷(1.25×8)
=320÷10
=32

Answer 5

0.35×2.4-0.4=0.4*（0.35*6-1）=0.4*(2.1-1)=0.4*1.1=0.4*(1+0.1)=0.4*1+0.4*0.1
=0.4+0.04=0.44
320÷1.25÷8=320/1.25*8=320/10=32