题目内容
| 巧解密码我能行 3X=
| X:3.25=
| 6X÷40%=18. |
(1)3X=
,
3X÷3=
÷3,
X=
×
,
X=
;
(2)X:3.25=
,
5X=3.25,
5X÷5=3.25÷5,
X=0.65;
(3)6X÷40%=18,
6X÷0.4=18,
6X÷0.4×0.4=18×0.4,
6X=7.2,
6X÷6=7.2÷6,
X=1.2.
| 4 |
| 5 |
3X÷3=
| 4 |
| 5 |
X=
| 4 |
| 5 |
| 1 |
| 3 |
X=
| 4 |
| 15 |
(2)X:3.25=
| 1 |
| 5 |
5X=3.25,
5X÷5=3.25÷5,
X=0.65;
(3)6X÷40%=18,
6X÷0.4=18,
6X÷0.4×0.4=18×0.4,
6X=7.2,
6X÷6=7.2÷6,
X=1.2.
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