问题
填空题
2、9、4可以组成______个不同的三位数，其中最大的数是______．
答案
共有3×2×1=6（种），
它们是：249、294；492、429；942、924；共6种；其中最大的数是942．
答：用2、4、9可以写出6个不同的三位数．
故答案为：6，942．
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2、9、4可以组成______个不同的三位数，其中最大的数是______．
共有3×2×1=6（种），
它们是：249、294；492、429；942、924；共6种；其中最大的数是942．
答：用2、4、9可以写出6个不同的三位数．
故答案为：6，942．
| 用方框内所给单词的适当形式填空。 | |
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| Tom and his sister Amy are students. Tom takes a 1 to school every day, and Amy does too. Some of 2 friends walk(步行，走)to school. Tom and Amy 3 home at four o’clock in the afternoon. They do their 4 before(在....以前) dinner, and they play computer games 5 dinner. They usually go to 6 early in the evening. Tom and Amy have 7 meals(饭) a day: breakfast, lunch and dinner. They have breakfast 8 home. On school days, they have lunch at school. They usually 9 dinner at home. Their father comes home from 10 at six and their mother cooks dinner at seven. |