题目内容
生产一批零件,师傅单独做要6小时,徒弟单独做要10小时,当师徒合作,完成任务时,师傅比徒弟多生产了240个,这批零件共多少个?
1÷(
+
),
=1÷
,
=3
(小时);
240÷(
×3
-
×3
),
=240÷(
-
),
=240÷(
-
),
=240×
,
=960(个);
答:这批零件共960个.
| 1 |
| 6 |
| 1 |
| 10 |
=1÷
| 8 |
| 30 |
=3
| 3 |
| 4 |
240÷(
| 1 |
| 6 |
| 3 |
| 4 |
| 1 |
| 10 |
| 3 |
| 4 |
=240÷(
| 15 |
| 24 |
| 15 |
| 40 |
=240÷(
| 75 |
| 120 |
| 45 |
| 120 |
=240×
| 120 |
| 30 |
=960(个);
答:这批零件共960个.
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