下面各题,怎样简便就怎样算.
来源:学生作业帮 编辑:搜狗做题网作业帮 分类:综合作业 时间:2024/08/08 14:12:30
下面各题,怎样简便就怎样算. 6.45-3.62+5.62 | 16.78-2.54+3.22-1.46 | 32×25 |
4200÷(50×7) | 58×23+23×42 | 101×53-53 |
![下面各题,怎样简便就怎样算.](/uploads/image/z/18546481-1-1.jpg?t=%E4%B8%8B%E9%9D%A2%E5%90%84%E9%A2%98%EF%BC%8C%E6%80%8E%E6%A0%B7%E7%AE%80%E4%BE%BF%E5%B0%B1%E6%80%8E%E6%A0%B7%E7%AE%97%EF%BC%8E)
(1)6.45-3.62+5.62
=6.45+(5.62-3.62)
=6.45+2
=8.45
(2)16.78-2.54+3.22-1.46
=(16.78+3.22)-(2.54+1.46)
=20-4
=16
(3)32×25
=8×(4×25)
=8×100
=800
(4)4200÷(50×7)
=4200÷7÷50
=600÷50
=12
(5)58×23+23×42
=(58+42)×23
=100×23
=2300
(6)101×53-53
=(101-1)×53
=100×53
=5300
=6.45+(5.62-3.62)
=6.45+2
=8.45
(2)16.78-2.54+3.22-1.46
=(16.78+3.22)-(2.54+1.46)
=20-4
=16
(3)32×25
=8×(4×25)
=8×100
=800
(4)4200÷(50×7)
=4200÷7÷50
=600÷50
=12
(5)58×23+23×42
=(58+42)×23
=100×23
=2300
(6)101×53-53
=(101-1)×53
=100×53
=5300