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解方程或比例.①548x-2=0.5②x8.1=410.8③X:12=74:2.8.
题目详情
解方程或比例. ①
②
③X:12=
|
①
5 |
48 |
②
x |
8.1 |
4 |
10.8 |
③X:12=
7 |
4 |
①
5 |
48 |
②
x |
8.1 |
4 |
10.8 |
③X:12=
7 |
4 |
①
5 |
48 |
②
x |
8.1 |
4 |
10.8 |
③X:12=
7 |
4 |
①
5 |
48 |
②
x |
8.1 |
4 |
10.8 |
③X:12=
7 |
4 |
5 |
48 |
②
x |
8.1 |
4 |
10.8 |
③X:12=
7 |
4 |
5 |
48 |
x |
8.1 |
4 |
10.8 |
③X:12=
7 |
4 |
x |
8.1 |
4 |
10.8 |
③X:12=
7 |
4 |
4 |
10.8 |
7 |
4 |
7 |
4 |
▼优质解答
答案和解析
(1)
x -2=0.5,
x-2+2=0.5+2 ,
x×
=2.5×
,
x=24;
(2)
=
,
10.8x=8.1×4,
10.8x÷10.8=32.4÷10.8,
x=3;
(3) x:12=
:2.8 ,
2.8x=12×
,
2.8x÷2.8=21÷2.8,
x=7.5. (1)
x -2=0.5,
x-2+2=0.5+2 ,
x×
=2.5×
,
x=24;
(2)
=
,
10.8x=8.1×4,
10.8x÷10.8=32.4÷10.8,
x=3;
(3) x:12=
:2.8 ,
2.8x=12×
,
2.8x÷2.8=21÷2.8,
x=7.5. (1)
x -2=0.5,
x-2+2=0.5+2 ,
x×
=2.5×
,
x=24;
(2)
=
,
10.8x=8.1×4,
10.8x÷10.8=32.4÷10.8,
x=3;
(3) x:12=
:2.8 ,
2.8x=12×
,
2.8x÷2.8=21÷2.8,
x=7.5. (1)
x -2=0.5,
x-2+2=0.5+2 ,
x×
=2.5×
,
x=24;
(2)
=
,
10.8x=8.1×4,
10.8x÷10.8=32.4÷10.8,
x=3;
(3) x:12=
:2.8 ,
2.8x=12×
,
2.8x÷2.8=21÷2.8,
x=7.5.
5 48 5 5 5 48 48 48 x -2=0.5,
x-2+2=0.5+2 ,
x×
=2.5×
,
x=24;
(2)
=
,
10.8x=8.1×4,
10.8x÷10.8=32.4÷10.8,
x=3;
(3) x:12=
:2.8 ,
2.8x=12×
,
2.8x÷2.8=21÷2.8,
x=7.5.
5 48 5 5 5 48 48 48 x-2+2=0.5+2 ,
x×
=2.5×
,
x=24;
(2)
=
,
10.8x=8.1×4,
10.8x÷10.8=32.4÷10.8,
x=3;
(3) x:12=
:2.8 ,
2.8x=12×
,
2.8x÷2.8=21÷2.8,
x=7.5.
5 48 5 5 5 48 48 48 x×
48 5 48 48 48 5 5 5 =2.5×
48 5 48 48 48 5 5 5 ,
x=24;
(2)
=
,
10.8x=8.1×4,
10.8x÷10.8=32.4÷10.8,
x=3;
(3) x:12=
:2.8 ,
2.8x=12×
,
2.8x÷2.8=21÷2.8,
x=7.5.
x 8.1 x x x 8.1 8.1 8.1 =
4 10.8 4 4 4 10.8 10.8 10.8 ,
10.8x=8.1×4,
10.8x÷10.8=32.4÷10.8,
x=3;
(3) x:12=
:2.8 ,
2.8x=12×
,
2.8x÷2.8=21÷2.8,
x=7.5. x:12=
7 4 7 7 7 4 4 4 :2.8 ,
2.8x=12×
,
2.8x÷2.8=21÷2.8,
x=7.5.
7 4 7 7 7 4 4 4 ,
2.8x÷2.8=21÷2.8,
x=7.5.
(1)
x=24; (2)
10.8x=8.1×4, 10.8x÷10.8=32.4÷10.8, x=3; (3) x:12=
2.8x=12×
2.8x÷2.8=21÷2.8, x=7.5. |
5 |
48 |
5 |
48 |
5 |
48 |
48 |
5 |
48 |
5 |
x=24;
(2)
x |
8.1 |
4 |
10.8 |
10.8x=8.1×4,
10.8x÷10.8=32.4÷10.8,
x=3;
(3) x:12=
7 |
4 |
2.8x=12×
7 |
4 |
2.8x÷2.8=21÷2.8,
x=7.5.
5 |
48 |
5 |
48 |
5 |
48 |
48 |
5 |
48 |
5 |
x=24;
(2)
x |
8.1 |
4 |
10.8 |
10.8x=8.1×4,
10.8x÷10.8=32.4÷10.8,
x=3;
(3) x:12=
7 |
4 |
2.8x=12×
7 |
4 |
2.8x÷2.8=21÷2.8,
x=7.5.
5 |
48 |
5 |
48 |
5 |
48 |
48 |
5 |
48 |
5 |
x=24;
(2)
x |
8.1 |
4 |
10.8 |
10.8x=8.1×4,
10.8x÷10.8=32.4÷10.8,
x=3;
(3) x:12=
7 |
4 |
2.8x=12×
7 |
4 |
2.8x÷2.8=21÷2.8,
x=7.5.
5 |
48 |
5 |
48 |
5 |
48 |
48 |
5 |
48 |
5 |
x=24;
(2)
x |
8.1 |
4 |
10.8 |
10.8x=8.1×4,
10.8x÷10.8=32.4÷10.8,
x=3;
(3) x:12=
7 |
4 |
2.8x=12×
7 |
4 |
2.8x÷2.8=21÷2.8,
x=7.5.
5 |
48 |
5 |
48 |
5 |
48 |
48 |
5 |
48 |
5 |
x=24;
(2)
x |
8.1 |
4 |
10.8 |
10.8x=8.1×4,
10.8x÷10.8=32.4÷10.8,
x=3;
(3) x:12=
7 |
4 |
2.8x=12×
7 |
4 |
2.8x÷2.8=21÷2.8,
x=7.5.
5 |
48 |
5 |
48 |
48 |
5 |
48 |
5 |
x=24;
(2)
x |
8.1 |
4 |
10.8 |
10.8x=8.1×4,
10.8x÷10.8=32.4÷10.8,
x=3;
(3) x:12=
7 |
4 |
2.8x=12×
7 |
4 |
2.8x÷2.8=21÷2.8,
x=7.5.
5 |
48 |
48 |
5 |
48 |
5 |
x=24;
(2)
x |
8.1 |
4 |
10.8 |
10.8x=8.1×4,
10.8x÷10.8=32.4÷10.8,
x=3;
(3) x:12=
7 |
4 |
2.8x=12×
7 |
4 |
2.8x÷2.8=21÷2.8,
x=7.5.
x |
8.1 |
4 |
10.8 |
10.8x=8.1×4,
10.8x÷10.8=32.4÷10.8,
x=3;
(3) x:12=
7 |
4 |
2.8x=12×
7 |
4 |
2.8x÷2.8=21÷2.8,
x=7.5. x:12=
7 |
4 |
2.8x=12×
7 |
4 |
2.8x÷2.8=21÷2.8,
x=7.5.
7 |
4 |
2.8x÷2.8=21÷2.8,
x=7.5.
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