小学5年级数题

来源:百度知道 编辑:UC知道 时间:2024/06/07 13:34:11
解方程 2(4-X)=0.8 4X+3*0.7=6.5
对不起,我刚才打错了一个字,请大家原谅

(1)2(4-X)=0.8
2*4-2*X=0.8
8-0.8=2X
2X=7.2
X=3.6
(2)4X+3*0.7=6.5
4X+2.1=6.5
4X=6.5-2.1
4X=4.4
X=1.1

2(4-X)=0.8
解:4-X=0.8÷2
4-X=0.4
X=4-0.4
X=3.6

4X+3*0.7=6.5
解:4X+2.1=6.5
4X=6.5-2.1
4X=4.4
X=4.4÷4
X=1.1

2(4-X)=0.8
4-X=0.4
X=4-0.4
X=3.6

4X+3*0.7=6.5
4X=6.5-3*0.7
4X=6.5-2.1
4X=4.4
X=1.1

2(4-X)=0.8
解:4-X=0.8÷2
X=4-0.4
X=3.6

4X+3*0.7=6.5
解:4X+2.1=6.5
4X=4.4
X=1.1

2(4-x)=0.8 4x+3·0.7=6.5
解: 8-2x=0.8 解: 4x+2.1=6.5
2x=8-0.8 4x=4.4
2x=7.2 x=1.1
x=3.6
谢谢采纳哈!!