简便计算:(1)4.56×0.27+4.56×0.63+0.456 (2)5.85+6.13+3.87-1.85 (3)12.5×5.7×8-5.7×90

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/28 04:46:03
简便计算:(1)4.56×0.27+4.56×0.63+0.456 (2)5.85+6.13+3.87-1.85 (3)12.5×5.7×8-5.7×90

简便计算:(1)4.56×0.27+4.56×0.63+0.456 (2)5.85+6.13+3.87-1.85 (3)12.5×5.7×8-5.7×90
简便计算:(1)4.56×0.27+4.56×0.63+0.456 (2)5.85+6.13+3.87-1.85 (3)12.5×5.7×8-5.7×90

简便计算:(1)4.56×0.27+4.56×0.63+0.456 (2)5.85+6.13+3.87-1.85 (3)12.5×5.7×8-5.7×90
4.56×0.27+4.56×0.63+0.456
=4.56×(0.27+0.63+1)
=4.56×2
=9.12
5.85+6.13+3.87-1.85
=5.85-1.85+6.13+3.87
=4+10
=14
12.5×5.7×8-5.7×90
=100×5.7-5.7×90
=5.7×(100-90)
=5.7×10
=57

1)4.56×0.27+4.56×0.63+0.456 =4.56(0.27+0.63+0.1)
2)5.85+6.13+3.87-1.85 =(5.85-1.85)+(6.13+3.87)
3)12.5×5.7×8-5.7×90=5.7(12.5×8-90)