把9460000000改写成用“亿”作单位的数是______，用四舍五入法去掉亿后面的尾数后是______；把598400改写成用“万”作单位的数是______，将这个数四舍五入到万位后是______．
（1）9460000000=94.6亿；
9460000000≈95亿；
（2）598400=59.84万；
598400≈60万；
故答案为：94.6亿，95亿，59.84万，60万．
Allan’s school has about 2,500 students in six grades—Grades Seven to Twelve. It 小题1: 120 full time students 小题2: 45 classrooms. Allan 小题3: to school at 7:00a.m by bus. 小题4: school starts at 7:30. Everyone must go to school before it starts. There 小题5: seven classes in a day, four in the morning and three in the afternoon. After class four in the morning, everyone goes to have lunch in the canteen (食堂). Not many people bring food to school 小题6: food in the canteen 小题7: cheap. Class five starts at 2:30 p.m. and class seven ends at 5:00 p.m. 小题8: school in the afternoon, some students go home, some play at school. The most popular sport at school is basketball. Allan usually goes home at 5:30 p.m. because he goes to play football and basketball at school. After that he goes home by bike. When he gets home, he cleans my home every day, then he goes to take 小题9: shower (淋浴) and 小题10: his homework.
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