解方程(1)0.25x=0.78 &...
答案:1 悬赏:30
解决时间 2021-01-29 02:27
- 提问者网友:刺鸟
- 2021-01-28 18:39
解方程(1)0.25x=0.78 &...
最佳答案
- 二级知识专家网友:琴狂剑也妄
- 2021-01-28 19:04
(1)0.25x=0.78
0.25x÷0.25=0.78÷0.25
x=3.12;
(2)0.1702÷x=4.6
0.1702÷x×x=4.6×x
4.6x=0.1702
4.6x÷4.6=0.1702÷4.6
x=0.037;
(3)x+6.9=52.4
x+6.9-6.9=52.4-6.9
x=45.5
(4)2(x+3.6)=12.4
2(x+3.6)÷2=12.4÷2
x+3.6=6.2
x+3.6-3.6=6.2-3.6
x=2.6.
0.25x÷0.25=0.78÷0.25
x=3.12;
(2)0.1702÷x=4.6
0.1702÷x×x=4.6×x
4.6x=0.1702
4.6x÷4.6=0.1702÷4.6
x=0.037;
(3)x+6.9=52.4
x+6.9-6.9=52.4-6.9
x=45.5
(4)2(x+3.6)=12.4
2(x+3.6)÷2=12.4÷2
x+3.6=6.2
x+3.6-3.6=6.2-3.6
x=2.6.
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