题目内容
解方程
X×
=
X-15%X=37.4
X+25=95
X:25=1.2:75.
X×
| 1 |
| 4 |
| 5 |
| 8 |
X-15%X=37.4
| 3 |
| 5 |
X:25=1.2:75.
(1)X×
=
,
X×
÷
=
÷
,
x=2.5;
(2)X-15%X=37.4,
85%x÷85%=37.4÷85%,
x=44;
(3)
X+25=95,
x+25-25=95-25,
x÷
=70÷
,
x=116
;
(4)X:25=1.2:75,
75x=25×1.2,
75x÷75=30÷75,
x=0.4.
| 1 |
| 4 |
| 5 |
| 8 |
X×
| 1 |
| 4 |
| 1 |
| 4 |
| 5 |
| 8 |
| 1 |
| 4 |
x=2.5;
(2)X-15%X=37.4,
85%x÷85%=37.4÷85%,
x=44;
(3)
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
x=116
| 2 |
| 3 |
(4)X:25=1.2:75,
75x=25×1.2,
75x÷75=30÷75,
x=0.4.
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