Question

五年级解方程

10.6+3n=22.6 7mX6=420 5n/0.5=4 2x+1.5x=17.5

Answer 1

移项：3n=22.6-10.6 3n=12 n=4

42m=420 m=10

去分母，两边同时乘以0.5 5n=2 n=2/5

合并同类项 3.5x=17.5 x=5

Answer 2

(1) 10.6+3n=22.6
3n=22.6-10.6
3n=12
n=4
(2) 7mX6=420
7m=420/6
7m=70
m=70/7
m=10
(3)5n/0.5=4
5n=4X0.5
5n=2
n=2/5
n=0.4
(4) 2x+1.5x=17.5
(2+1.5)x=17.5
3.5x=17.5
x=17.5/3.5
x=5

Answer 3

1. 3n=22.6-10.6 解得 n=4

2. 7m=420/6 解得 m=10

3. 5n=4*0.5 解得 n=0.4

4. 3.5X=17.5 解得 X=5

Answer 4

10.6+3N=22。6 10。6+3N-10。6=22。6-10。6 3N=12 N=4
7M*6=420 42X=420 X=10
5N/0。5=4 5N/0。5*0.5=4*0.5 5N=2 N=0.4
2X+1.5X=17.5 3.5X=17.5 X=5

Answer 5

2x+1.5x=17.5
(2+1.5)x=17.5
3.5x = 17.5
x=17.5/3.5
x=5

Answer 6

1.
10.6+3n=22.6
解：3n=22.6-10.6
3n=12
n=12/3
n=4
2.
7m*6=420
解：7m=420/6
7m=70
m=70/7
m=10
3.
5n/0.5=4
解：5n=0.5*4
5n=2
n=2/5
n=0.4
4.
2x+1.5x=17.5
解：3.5x=17.5
x=17.5/3.5
x=5