Final examination paper of fourth grade mathematics in primary school.

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4 and 0.049 in 1 are at () position, indicating (), 9 is at () position, indicating (), and the counting unit is (), which is pronounced as ().

2. Three numbers consisting of ten, five tenths and six thousandths are (), pronounced as (), and two decimal places are ().

Please fill in this form.

82 cm = () meters 3 yuan 4.2 points = () yuan.

3.02 m2 = () m2 () cm2

9.08 tons = () tons () kg

4, a factory x tons of raw coal, burned for t days, burned a ton every day, and there are () tons left.

5, 3 yuan 5 Angle = () yuan.

6, 3 kilometers and 20 meters = () kilometers.

7. Move the decimal point of () to the left by two places, which is 5.23.

Second, judgment.

1、2a=a2()

2. 1 is 0.00 1 1000 times. ( )

3、468? 99+468=468? (99+ 1) ( )

In a set of numbers, the average value is less than the maximum value. ( )

5. The sum of the two internal angles of a triangle is 9 1 degree. This triangle must be an acute triangle. ( )

Third, choose

1 and 0.28 are counted in ()

a 0. 1 B 0.0 1 C 0.00 1

2, 3 kg 30 g = () kg

A 3.3 B 3.03 C 3.003

3. Numbers greater than 0.4 and less than 0.5 ().

A 1 B 3 C countless

4, 0.4747 keep three decimal places is ()

A 0.474 B 0.475 C 0.477

5. Four classes in the third grade of experimental primary school participated in tree planting activities, planting 18 trees on the first day, 20 trees on the second day and 22 trees on the third day. The following formula () is to find the average number of trees planted in each class.

A( 18+20+22)？ 3 B( 18+20+22)？ 4 C( 18+20+22)？ seven

Fourth, operation

1, oral calculation

420? 30= 92= 0.32? 1000= 3.06? 10=

700? 14= 2.7+0.8= 5.4? 10= 25? 4= 1800? 18= 125? 8= 7.2-2.8= 720? 30= 2.9+ 10.4= 0? 24 1= 172? 100= 26-4.2= 7.06-2.7= 8? 8? 8? 8= 0.42+9.5= 65? 25? 4=

2. How to make the calculation as simple as possible?

332? 4+68? 4 1.35-0.87+0.65-0. 13 15? 4? 25

19.92+ 14.4-9.92 78? 10 1 6.9+0. 1-6.9+0. 1

3. Column calculation.

What is the sum of ①, 4.5 and 2.8?

② What is the quotient of the sum of126 plus 42 divided by 3?

Verbs (short for verb) solve problems.

1. A book has 248 pages. Xiaoling reads X pages every day. How many pages are left in a week? Please make a formula with letters. If X=2 1, please calculate how many pages are left.

2. Red Star Primary School bought some sporting goods. It cost 135.60 yuan to buy football, and basketball is more than football 12.20 yuan. How much did Red Star Primary School spend on football and basketball?

Students from Class One, Grade Four, Happiness Primary School donated money for Wenchuan disaster area. A group of 6 people donated money to 20 yuan, two groups of 5 people donated money 1 10 yuan, three groups of 6 people donated money to 96 yuan, and four groups of 5 people donated money to 80 yuan.

(1) What is the average donation of each group in Class One, Grade Four?

(2) How much does the average person in Class One, Grade Four donate?

4. The bus speed is 90km/h, and the car speed is125km/h.. Two cars leave from the same place in opposite directions at the same time. How many kilometers are the two cars apart in five hours?