The fourth grade mathematics first volume unit 2 examination paper

First, fill in the blanks.

1. Li Hua exercises in the morning. She used to run 100 meter every day, but now she runs 200 meters more than before. Now she runs () meters every day and () meters every week (7 days).

2. Wang Hongyou 14 stamps, Xiaobo has one more stamp than her, and Xiaobo has () stamps.

3. The price of a children's sweater is Z yuan, an adult sweater is more than a children's sweater 13 yuan, and an adult sweater is () yuan.

4. It is known that the length of a rectangle is a and the width is b, and the formula for finding the area s is (). If a = 4m and b = 6m, the area is () m2.

There are 300 fruit trees in the orchard, including m apple trees, the rest are pear trees, and there are () pear trees.

6. A basket of apples is X kilograms, and the mass of a basket of peaches is Y kilograms less than that of apples. (x-y) kilograms means ().

Xiao Ming bought four books, each of which cost Z yuan. Paid 50 yuan, he should get back () yuan.

Second, the judgment question. (Draw ""on the right and "?"on the wrong.) )

1.x 3 times 5 can be written as 3x+5. ( )

2. When a=2, a2 and 2a are equal in size. ( )

If the side length of a square is one meter, its area is 4a square meters. ( )

4. The number less than 8 is x-8. ( )

Third, multiple choice questions. (Put the serial number of the correct answer in brackets)

1. If A stands for unit price, X stands for quantity and C stands for total price, then A is equal to ().

ax b c \x

C.c-x D.c+x

2. How much is 8 times x more than 28? The formula is ().

A.8x-28 B.28-8x

C.28x-8 D.8x+28

3. In the following groups, the results are not necessarily the same ().

A.2×2 and 22 B.x2 and x×2

C.82 and 8×8 D.ab× 1 and ab

The price of computer desk is one yuan, and the price of computer chair is y yuan. I bought 26 sets of computer desks and chairs, which should be () yuan.

A.26a+y

C.26+a+y D.26a+26y

Fourth, fill in the form.

Unit Price (Yuan) Quantity (Unit) Total Price (Yuan)

a20

B.C.

b36

5. When a = 2, b = 3 and c = 4, find the following values.

1.a+b+c 2.a-(c-b) 3.ac-ab

Sixth, solve the problem.

1. Chorus competition. Chorus in the fourth grade, boys row A, girls row B, each row 16 people.

(1) Use a formula containing letters to represent the total number of participants in the fourth grade.

(2) When A = 12 and B = 10, how many people will take part in the competition in grade one?

2. In the activity of "Supporting Drinking Water in Arid Areas", students from three classes of a fourth grade enthusiastically donated money: class one donated 496 yuan, class two donated 563 yuan and class three donated 1 yuan. The formula with the letter A is used to indicate the amount donated by the students of Class Four in this school. When a=304, how much did the fourth-grade students donate?

3. Find the perimeter and area of the picture below.

(1) Use letters to indicate the perimeter and area of the figure below. (Unit: cm)

(2) When a=32, what are the perimeters and areas of these two graphs?

Reference answer

I.1.m+2007m+1400 2.14+a3.2z+13

4. s = ab24 5.300m.

6. The quality of a basket of peaches

7.50-4z

Second, 1. 2.3.4.

Three. 1.B 2。 A 3。 B 4。 D

Fourth, 20a c÷ b 36÷ b

Verb (abbreviation of verb) 1.9 2. 1 3.2