1, 50 decimeter = () meter 4 cm = () millimeter

2 tons = () kg () m =900 cm.

30 cm = () decimeter 8 kg = () gram

() tons = 7000kg () meters = 5km.

2,13mm+27mm = () cm

1 m -3 decimeter = () decimeter

8 km-4000m = () km

2 tons -500 kg = () kg

26 mm +38 mm = () cm () mm

3. On the student's ruler, there are () squares with the length of 1 cm, and each square is ().

4. What we usually say 1 km is (), which is a larger unit of length than ().

5. The speed of the train is 80 kilometers per hour, 2 hours () kilometers and 3 hours () kilometers.

6, a bed is 2 meters, which can also be said to be 20 () long.

7. The units of length we have learned are (), (), (), () and (), and the units of mass are (), () and ().

8. The track of the sports ground is generally 400 meters 1 lap and () kilometers for two and a half laps.

Second, fill in the appropriate unit name in brackets. (8 points)

1, the thickness of a calling card is about 1 ().

2. The length of the math textbook is about 2 1 ().

3. Xiaohong is 135 ().

4. The bearing capacity of highway bridge is 60 ().

5, a plane flying 850 per hour ().

6. A skipping rope is 2 () long.

7. A cow weighs about 500 ().

8. A table is 7 () high or 70 () high.

Third, complete the following vertical pose. (12)

67 529 467

+59 +863 + 523

23 1 700 503

- 92 - 536 -7 8

Fourth, column calculation. (6 points)

How many tons is 200 tons more than 94 tons?

② The number A is 306, which is 94 less than the number B. What is the number B?

Verb (abbreviation for verb) is true or false. (Tick × for the right and tick √ for the wrong) (8 points)

1, and the minimum difference between four digits and three digits is 1. ( )

2. 1 ton stone must be heavier than 1000 kg cotton. ( )

3. The formula for how much 385 is more than 250 is: 385+250. ( )

4. When two three digits are added, the total must be three digits. ( )

5, pen addition and subtraction, must start from high digits. ( )

6. It is about 670 meters from a slope to Shangzhi. ( )

7. Two pigs weigh 2 tons. ( )

8. In the addition formula, the sum must be greater than two addends. ( )

Write the following questions and check them. (16)

674+248=503+ 198=

Check calculation: check calculation

900-873= 342- 153=

Check calculation: Check calculation:

Seven, solve the problem. (35 points, including 5 points for 1-5, 4 for 2+3, and 6 for 3+3+4= 10).

There are 704 comic books in the school library, 285 more than story books. How many story books are there?

There were 637 tourists in a park on Sunday morning, 269 people left at noon and 238 people came in the afternoon. How many people are there in the park at this time?

3. A book has 826 pages. Xiao Ming read 158 on the first day and 239 on the second day. How many pages are left to read?

4. There are 358 students in the fourth grade and 3 19 students in the third grade in the urban central primary school.

(1) You estimate that there will be more than 700 students in the third and fourth grades, right?

(2) Recalculate to see if your estimation is correct.

I just bought a sportswear and spent 235 yuan on a pair of 98 yuan sports shoes. He paid 350 yuan, the shop assistant. How much should he get back? ,

6. The following are the prices of some commodities.

Bicycle phone mobile phone rice cooker

468 yuan 176 yuan 900 yuan 264 yuan.

(1) How much is a bicycle and a mobile phone?

(2) Propose and answer a question calculated by subtraction.

(3) 1000 yuan can buy what goods, how much money is left?