简便计算:1.25×8.8 1.25×5.7+5/4×4.3 8.3×2.5+75×0.38

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/22 16:33:53
简便计算:1.25×8.81.25×5.7+5/4×4.38.3×2.5+75×0.38简便计算:1.25×8.81.25×5.7+5/4×4.38.3×2.5+75×0.38简便计算:1.25×8.

简便计算:1.25×8.8 1.25×5.7+5/4×4.3 8.3×2.5+75×0.38
简便计算:1.25×8.8 1.25×5.7+5/4×4.3 8.3×2.5+75×0.38

简便计算:1.25×8.8 1.25×5.7+5/4×4.3 8.3×2.5+75×0.38
1、1.25×8.8=1.25×8×1.1=11
2、1.25×5.7+5/4×4.3=1.25×5.7+1.25×4.3=1.25×(5.7+4.3)=1.25×10=12.5
3、8.3×2.5+75×0.38=(4×2+0.3)×2.5+75×0.38=20+0.3×2.5+0.75×38=20+0.25×3×(40-1)
=20+3×(10-0.25)=20+30-0.75=49.25

1.25×8.8 =1.25×(8+0.8)=1.25×8+1.25×0.8=10+1=11
1.25×5.7+5/4×4.3=1.25×(5.7+4.3)=1.25×10=12.5
最后一个不知

1.25*(8+0.8)
1.25*(6-0.2)+5/4*(4+0.3)
(8+0.3)*2.5+75*(0.4-0.02)