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解方程或解比例 ①6x=107 ②3:8=24:x ③34:910=x:35 ④12.52.5=x8 ⑤x-35x=65 ⑥0.25+25%x=1.5, ⑦12X-45=15 ⑧4.5x-12x=6.

编辑:chaxungu时间:2026-04-27 13:37:53分类:小学数学题库

解方程或解比例
6
x
=
10
7
②3:8=24:x
3
4
9
10
=x:
3
5
12.5
2.5
=
x
8
⑤x-
3
5
x=
6
5
⑥0.25+25%x=1.5;
1
2
X-
4
5
=
1
5
⑧4.5x-
1
2
x=6.
6
x
=
10
7

10x=6×7,
10x÷10=42÷10,
x=4.2;

②3:8=24:x,
3x=8×24,
3x÷3=192÷3,
x=64;

3
4
9
10
=x:
3
5

9
10
x=
3
4
×
3
5

9
10
9
10
=
9
20
÷
9
10

x=0.5;

12.5
2.5
=
x
8

2.5x=12.5×8,
2.5x÷2.5=100÷2.5,
x=40;

⑤x-
3
5
x=
6
5

2
5
2
5
=
6
5
÷
2
5

x=3;

⑥0.25+25%x=1.5,
0.25+25%x-0.25=1.5-0.25,
25%x÷25%=1.25÷25%,
x=5;

1
2
x-
4
5
=
1
5

1
2
x-
4
5
+
4
5
=
1
5
+
4
5

1
2
1
2
=1÷
1
2

x=2;

⑧4.5x-
1
2
x=6,
4x÷4=6÷4,
x=1.5.