题目内容
求未知数
①x-
x=
②36-
x=18
③x:6=1.2:0.8.
①x-
| 3 |
| 5 |
| 16 |
| 5 |
②36-
| 2 |
| 3 |
③x:6=1.2:0.8.
①x-
x=
,
(1-
)x=
,
x=
,
x×
=
×
,
x=8;
②36-
x=18,
36-
x+
x=18+
x,
18+
x=36,
18+
x-18=36-18,
x=18;
x×
=18×
;
x=27;
③x:6=1.2:0.8,
0.8x=6×1.2,
0.8x=7.2,
0.8x÷0.8=7.2÷0.8,
x=9.
| 3 |
| 5 |
| 16 |
| 5 |
(1-
| 3 |
| 5 |
| 16 |
| 5 |
| 2 |
| 5 |
| 16 |
| 5 |
| 2 |
| 5 |
| 5 |
| 2 |
| 16 |
| 5 |
| 5 |
| 2 |
x=8;
②36-
| 2 |
| 3 |
36-
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
18+
| 2 |
| 3 |
18+
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 3 |
| 2 |
| 3 |
| 2 |
x=27;
③x:6=1.2:0.8,
0.8x=6×1.2,
0.8x=7.2,
0.8x÷0.8=7.2÷0.8,
x=9.
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