1. An equation containing () is called an equation.

2. The sum of number A and number B is 36, and number B is X, so number A is ().

3. There are 45 students in Class Five (1), and they are divided into Group A on average, with () students in each group.

4. The number less than 0.6 times of x is ().

5. The circumference of a square is indicated by the letter (). (the side length is a. )

6. The solution of equation x-8=2 is ().

7. There are X goats, and the number of sheep is three times that of goats. Goats and sheep * * * ().

8. The basis for solving equation 2x=3.8 is ().

9. Warehouse A stores X packages of grain, warehouse B stores three times as much as warehouse A, and warehouse B stores () packages of grain.

10. Fruit shop delivers 15 baskets of apples, 1 kg, 8 baskets of pears, 1 kg, apples and pears 1 kg.

1 1. Fill in ">" in (). "<" or "=".

252 ( )25×25 4.3×2 ( )4.32

0.52( )0.025 2x？ x( )2x2

12. The quotient of dividing two numbers is 3.67. If the dividend is enlarged by 100 times and the divisor is enlarged by 10 times, then the quotient is ().

Second, sentence. (65438+ 0 points for each question, ***5 points)

1.a2 and a? A means that two A's are multiplied. ( )

2. Given a= 12, b=5 and a-(b-c)= 10, then c=4. ( )

3.a has more C than B, then B+C = A. ()

4. The solution of the equation x÷ 12=6 is x=2. ( )

5.a mill grinds for one hour in the morning, b hours in the afternoon and c tons. How many tons of grinding per hour on average? The formula is c \u( a+b). ( )

Third, choose one. (65438+ 0 points for each question, ***6 points)

1. The value of the unknown quantity that makes both sides of the equation equal is called ().

A. Solving equations

B. the solution of the equation

C. Unknown number

2. In the following formula, there is an equation ().

A.a-b

B.( 12-x)÷4=3

C.3x+2 > 7

3. When a=4, b=5 and c=6, the value of bc-ac is ().

A. 1 B. 10

C.6 D. 4

In the fifth grade, 60 trees were planted, 4 fewer than in the fourth grade. Planting trees in the fourth grade ().

A.26 B. 32 trees

C. 19 D.28

5. The sum of half a and 4.5 is expressed as ().

A.2a+4.5 B..a \2+4.5

C.a÷2-4.5 D.2÷a+4.5

6. My height this year is 1.42m, which is 8cm higher than last year. Ask me how tall I was last year. Suppose the height of last year was x meters, then the incorrect equation is ().

A. 1.42+x=0.08

B.x+0.08= 1.42

C. 1.42-x=0.08

Fourth, solve the equation. (*** 15)

x-3.4=7.2

8x=36

(x+2)×3= 12

4.3×2-5x=3.6

4x-3×9=29

x-0.72x= 14

5. Solve the following problems by listing the equations. (3 points for each question, ***9 points)

The difference between 1. 5 times a certain number and 17 is equal to 8. Find a number.

2. 15 plus two times a number equals half of 38, and find this number.

Three times as much as three. Five is more than half of a number. 8. Find this number.

Sixth, look at the solution of the graphic equation. (3 points for each question, ***6 points)

Seven, solve the problem. (1 question 5 points, opponent 6 points, ***47 points)

1. You pay 15 yuan buys eggplant in the canteen and takes it back 1.4 yuan. How much is eggplant per kilogram?

The shopping center sells mixers. Do you know the original price and current price of this blender?

3. The canteen bought eggplant and potatoes ***380 kg, eggplant is 3 times more than potatoes, 8 kg, how much are eggplant and potatoes respectively?

4. The engineering team built a 450m-long highway. After five days of emergency repair, there was still150m left. How many meters are repaired on average every day? (solve by equation. )

5. Two cars, A and B, set out from A and B, which are 385 kilometers apart, and met after 3.5 hours. It is known that car A travels 60 kilometers per hour, so find the speed of car B. (There are two ways to solve this problem. )

6. In good years, tractors are used to plough farmland, and 2 tractors plough 2 hectares in 4 hours. According to this calculation, how many hectares of arable land can five tractors cultivate in 6.5 hours?

7. Only two kinds of tickets are sold in the park: individual ticket to 5 yuan, group ticket 10 person, and 30 yuan. Buy group tickets above 10, and each ticket can be discounted to 3 yuan. A company has 108 people visiting the park. Please write down three different ways to buy tickets. Express it with an expression. One of them is the formula of paying the least. )

8. The school bought 2 soccer balls and 20 solid balls, which cost 460 yuan. It is known that the price of each football is more than five solid balls, 5 yuan. What's the price of each football?