fill up a vacancy

1. 10 one is (), 10 ten is (), 10 one hundred is (), 10 one thousand is ().

2. A number, counted from the right, the first digit is (), the second digit is (), the third digit is (), and the fourth digit is (). The fifth place is (). When reading, there are one or two zeros in the middle, read only () zeros, and the last zero ().

3. Starting from () when reading, what is the number of a thousand miles, what is the number of a hundred miles, what is the number of a hundred miles, what is the number of a hundred miles, what is the number of a unit, what is the number of a hundred miles, what is the number of a mile, what is the number of a school?

4. Four digits are definitely better than three digits (), and three digits are definitely better than two digits ().

5. In the numerical table, the second digit from the right is (), and the lowest digit is ().

6.9587 consists of () thousand, () hundred, () ten and () one.

9. The two numbers adjacent to 1000 are () and ().

10. Write the two consecutive numbers after 998 as () and ().

1 1. With the three numbers of 2, 0 and 5, you can discharge () three digits.

12 has () hundreds. Ten of 4600 and () 260.

judge

1, Xiao Fang spent 5 minutes doing morning exercises. ( )

When the second hand turns, the hour hand takes a big step. ( )

Mom works 8 hours every day. ( )

The lunch time is 1 1: 30. ( )

5.half an hour is 30 minutes. ( )

6. Xiaoming needs 60 points to write a big character. ( )

7. The electronic watch shows that 6: 45 is 6: 45. ( )

choose

1. The number of 1 that is more than the maximum three digits is ().

a、999 B、 1000 C、 1 100

2. A four-digit number, which is 1 in thousands and digits and 0 in other digits, is ().

a、 10 10 B、 100 1 C、 1 100

3. When reading, there are two zeros () in the middle.

First, read it out. B, none of them should be read. C, you should read only a zero.

4. The biggest four digits are ().

a、 1000 B、9988 C、9999

5. Chapter five thousand and fifty-five Writing ().

a、5050 B、5550 C、5055

6. The number closest to 10000 is ().

a 9999 B 1000 C 9000

Improve ability

1, Xiao Lei, Erlei and Radar weigh themselves, Radar and Xiao Lei add up to 50 kilograms, Xiao Lei and Erlei add up to 49 kilograms, and three people add up to 76 kilograms. How much does Xiao Lei weigh?

2. Uncle Wang climbed 18 steps from the first floor to the third floor, so how many steps should he climb from the first floor to the fourth floor?

3. It takes 12 minutes to saw a piece of wood into four sections. If the sawing time is the same every time, how many minutes does it take to saw into six sections?

Xiaohong arrives at school at 2: 30 every afternoon and comes home from school at 5: 00. How long does she stay at school in the afternoon?

5. From 7: 00 a.m. to 65: 438+02 p.m., Master Wang rested for 65: 438+0 hours and processed 65: 438+005 parts. How many parts does he make per hour on average?

6. One class lasts 40 minutes, and the second class starts at 8: 50. When will it end?

7. The movie starts at 7: 30 pm and lasts for 2 hours and 20 minutes. When will it end?

8. The cartoon "Four-wheel Drive Brothers" starts at 2: 00 pm15 and ends at 3:40 pm. How long did this cartoon last?

9. The students went for an outing. It took them 1 hour and 45 minutes to reach their destination at 8 am. When did they leave?

1. Students go on an autumn outing, leave at eight in the morning and come back at six in the evening. How long did Yi * * stay outside?

2. Rabbits pick mushrooms. She picked 20 mushrooms from 8:25 to 8:30 in the morning. Do you know how many mushrooms she picks every minute on average?