题目内容
8χ÷
|
| ||||||||||
| χ:4=0.2:10% |
|
(1)8x÷
=
,
8x÷
×
=
×
,
8x=
,
8x÷8=
÷8,
x=
;
(2)
=
÷
,
=
,
2x=20×1,
2x÷2=20÷2,
x=10;
(3)x:4=0.2:10%
10%x=4×0.2,
10%x÷10%=4×0.2÷10%,
x=8;
(4)
:Χ=
:
,
x=
×
,
x×
=
×
,
x=
.
| 1 |
| 2 |
| 3 |
| 5 |
8x÷
| 1 |
| 2 |
| 1 |
| 2 |
| 3 |
| 5 |
| 1 |
| 2 |
8x=
| 3 |
| 10 |
8x÷8=
| 3 |
| 10 |
x=
| 3 |
| 80 |
(2)
| x |
| 20 |
| 1 |
| 8 |
| 1 |
| 4 |
| x |
| 20 |
| 1 |
| 2 |
2x=20×1,
2x÷2=20÷2,
x=10;
(3)x:4=0.2:10%
10%x=4×0.2,
10%x÷10%=4×0.2÷10%,
x=8;
(4)
| 5 |
| 6 |
| 2 |
| 3 |
| 3 |
| 10 |
| 2 |
| 3 |
| 5 |
| 6 |
| 3 |
| 10 |
| 2 |
| 3 |
| 3 |
| 2 |
| 1 |
| 4 |
| 3 |
| 2 |
x=
| 3 |
| 8 |
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