南外冲刺数学 2

南京雨花学社 2012春季班 六年级南外冲刺班 数学

第二讲

姓名__________ 成绩

本期主要数学术语的英语表述:

quotient 商余数 recurring decimal 循环小数recurring point 循环点 divisor 约数 mathematical symbol 运算符号 maximum 最大 multiple 倍数

1. Calculate计算:211×555+445×789+555×789+211×445=______.

2. New York time is Hong Kong time minus 13 hours. You have made an appointment with (约会) a friend that you will call him at 20 pm on 1 Apr. Then what time and date should you call him based on Hong Kong time? _____________________.

3. Three workers processed (加工) 90 spare parts within 5 hours. If 540 spare parts have to be processed(完成) within 10 hours, __________ workers are needed.

4. Among the whole numbers larger than 100, if we divide them by 13, how many of them will have the same quotient and remainder?

3 ,and make the new 5. We move the first recurring point of the recurring decimal 5.08586

recurring decimal as big as possible. What is the new recurring decimal?

6. There are two numbers in the divisors of 1998. What is the biggest one?

7. A dog is chasing a fox. The dog jumps once and advances(前进) 1.8 meters, and the fox jumps once and advances 1.1 meters. The dog jumps 2 times and at the same time the fox jumps 3 times. If the dog is 30 meters behind the fox at the start, it should run ________meters to catch up with(赶上) the fox.

8. Fill in mathematical symbols in the following blanks and make the difference between (1) and (2) as maximum as possible. What is the maximum difference?

(1)1□2□3□4□5□6□7=_________________

(2)7□6□5□4□3□2□1=_________________

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