六年级上册数学简便计算及答案

Question

如题所述

Answer 1

57➗23分之56=(56+1)x56分之23=然后分部写

Answer 2

0.125x4x2.5x8

Answer 3

1.25×32
=1.25 ×8×4
= 10×4
=40

Answer 4

2.8×4/5+8.2×4/5-4/5
＝（2.8+8.2-1）×4/5
＝10×4/5
＝8

Answer 5

2/3×4/7+2/3×2/7+2/3×1=2/3×(4/7+2/7+1=26/21