问题
解答题
56名同学去公园划船，把租来的3只大船和7只小船都坐满了．已知每只大船能比每只小船多坐2名同学，每只大船和每只小船各坐了多少人？
答案
设每只大船做x人，
3x+7×（x-2）=56，
3x+7x-14=56，
10x-14+14=56+14，
10x÷10=70÷10，
x=7，
7-2=5（人）；
答：每只大船可坐7人，每只小船可坐5人．
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56名同学去公园划船，把租来的3只大船和7只小船都坐满了．已知每只大船能比每只小船多坐2名同学，每只大船和每只小船各坐了多少人？
设每只大船做x人，
3x+7×（x-2）=56，
3x+7x-14=56，
10x-14+14=56+14，
10x÷10=70÷10，
x=7，
7-2=5（人）；
答：每只大船可坐7人，每只小船可坐5人．
| 根据表格内容完成下列短文。 | ||||||||||||||||
| It's useful to know how much money we usually spend on different things. Then, if we also know how much money we will have, we can decide which things we should buy now and which things we can go without or wait for. Here is a student's weekly budget (预算) during the school year.
have them at all. If he wants to save (节省) on bus fares, he can 1______ to class. If he doesn't buy any candy, he can save 2______ a week. Or he can save 3______ if he has no soft drinks. He can save on lunches if he brings his own. He may be able to save on VDs by borrowing them from his friends or 4______ second-hand (二手). He doesn't have to 5______ to the movies or restaurants. |