Excellent classroom answer in mathematics

I'll fill it out (***20 points)

1. The unit of length is: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

2. 1 decimeter = 10 ()? 1 m = 10()？ 1 cm = 10()？ 1( )= 100( )

A coin is about 2 () thick. A pen is about 2 () long. The blackboard is about 3 (? )。 Your height is about 137 (). The precipitation in July is about 10 ().

4、3 km - 1000 m =2()？ 7000m+9000m = () km

53900 meters (? ) 4 km 7 km (? ) 7000 meters

6. The quality unit is _ _ _ _ _ _ _ _ _

7、5kg=( )g？ 1t-400kg=( )kg？ 6000kg=( )t

8, 2 tons (? ) 12kg？ 1400g ()14kg

9. 1 ton-800kg = () kg? 400 kg +600 kg = (? ) tons

2 tons +500 kg = () kg? 4500 Jin +2500 Jin = (? ) tons

10, quadrilateral has () and ().

1 1, the rectangle is (? ) shape, it has four (), and the angles of the parallelogram are () and () respectively.

12, and the time unit is _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

13, 3 minutes = () seconds 4 hours = () minutes 8 1 minute = () hours () minutes.

Second, I can calculate (***27 points).

1, written calculation (② ③ need to check 15)

①97+28 ②427+ 175 ? ③723﹣480

2, column calculation (12 points)

(1) How much is 607 more than 909?

(2) One addend is 203, the other is 805, and what is the sum?

(3) What is the sum of the largest three digits and the smallest four digits?

Third, I'll judge (tick right, x wrong, ***8 points)

1, divide a circle into two parts, and each part is 1/2 () of this circle.

People are born every day in the world. ( )

3. use? 3 , 0 , 2 ? You can only put four different three digits. ( ? )

4. A quadrilateral with four equilateral sides must be a square ()

Four, I will think, I will explore (***8 points).

99× 1= 99×2= ? 99×3=

99×4= 99×5= ? 99×6=

I found it: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

5. Draw a rectangle and a square with a perimeter of 12 cm (***8 minutes) respectively.

Six, solve the problem (***25 points).

1. A piece of paper 1 decimeter long, divided into two sections on average. How long is each part? (Draw one by one)

There were 852 people in the painting and calligraphy exhibition hall in the morning, 793 people left at noon and 507 people came in the afternoon. How many people were there in the museum? How many people are in the museum all day?

3. The football field of Renmin Road Primary School is rectangular, with a length of100m and a width of 50m. How many meters does Xiaoming run once?

A rectangular vegetable field, 6 meters long and 3 meters wide, is surrounded by a fence. What is the total length of the fence? If one side is against the wall, how many meters should the fence be at least?

5. Class 3 (7) donated 406 yuan to the welfare home, and Class 3 (4) donated less than Class 3 (7) 14 yuan. How much did Class Two donate?

answer

1. 1，mm？ Centimeter? Decimeter? Rice? Kilometers (kilometers)

2. centimeters? Decimeter? Rice? Millimeter? centimetre

3. Huh? Decimeter? Rice? Centimeter? Millimeter? kilometre (km)

4. kilometers? 16

5、〈 ? =

6. grams? Kilogram? Tons? Kilogram? g？ many

7、5000 ? 600 ? six

8、〉〈

9、200 ? 1 ? 2500

10,4 angle? all sides