题目内容
300-2520÷24
简算:(
+
)×17×25
解比例 X:
=4:0.5.
简算:(
| 4 |
| 17 |
| 1 |
| 25 |
解比例 X:
| 3 |
| 4 |
(1)300-2520÷24,
=300-105
=195;
(2)(
+
)×17×25,
=
×17×25+
×17×25,
=100+17,
=117;
(3)X:
=4:0.5,
0.5x=
×4,
0.5x=3,
0.5x÷0.5=3÷0.5,
x=6.
=300-105
=195;
(2)(
| 4 |
| 17 |
| 1 |
| 25 |
=
| 4 |
| 17 |
| 1 |
| 25 |
=100+17,
=117;
(3)X:
| 3 |
| 4 |
0.5x=
| 3 |
| 4 |
0.5x=3,
0.5x÷0.5=3÷0.5,
x=6.
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