题目内容
解方程或解比例
①
|
②3:8=24:x | ③
|
④
| ||||||||||||||
⑤x-
|
⑥0.25+25%x=1.5; | ⑦
|
⑧4.5x-
|
①
=
,
10x=6×7,
10x÷10=42÷10,
x=4.2;
②3:8=24:x,
3x=8×24,
3x÷3=192÷3,
x=64;
③
:
=x:
,
x=
×
,
x÷
=
÷
,
x=0.5;
④
=
,
2.5x=12.5×8,
2.5x÷2.5=100÷2.5,
x=40;
⑤x-
x=
,
x÷
=
÷
,
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;
⑦
x-
=
,
x-
+
=
+
,
x÷
=1÷
,
x=2;
⑧4.5x-
x=6,
4x÷4=6÷4,
x=1.5.
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
3 |
4 |
9 |
10 |
3 |
5 |
9 |
10 |
3 |
4 |
3 |
5 |
9 |
10 |
9 |
10 |
9 |
20 |
9 |
10 |
x=0.5;
④
12.5 |
2.5 |
x |
8 |
2.5x=12.5×8,
2.5x÷2.5=100÷2.5,
x=40;
⑤x-
3 |
5 |
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;
⑦
1 |
2 |
4 |
5 |
1 |
5 |
1 |
2 |
4 |
5 |
4 |
5 |
1 |
5 |
4 |
5 |
1 |
2 |
1 |
2 |
1 |
2 |
x=2;
⑧4.5x-
1 |
2 |
4x÷4=6÷4,
x=1.5.
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