1, at x+56, 45-x = 45, 0. 12M=24,12×1.3 =15.6, x-2.5

12>a÷m、ab=0、8+X、6Y=0. 12、 12.5÷2.5、H+0.45> 1 .

The equation is:

These equations are:.

There are x trees in peach trees, and the number of trees in pear trees is four times that of peach trees. The number of pear trees represented by the formula containing X is ().

There are y apples, two pears are less than apples, and there are () pears.

4. The middle number of five consecutive natural numbers is a, and the sum of these five numbers is ().

5. fill in ">", "

① when a = 73, A+ 13 () 87.

② When x = 0.8, 2 ÷ x () is 0.4.

③ When y = 20, 5y() 100.

④ When x = 9.6, x-3.8 () 3.8.

6. Xiaoming, Xiaojun and Xiaogang ran 100 meters. Xiao Ming used x seconds, Xiao Jun used 2 seconds more than Xiao Ming, and Xiao Gang used 0.2 seconds less than Xiao Ming. () is the champion.

7. To solve the equation X÷6= 18, you can do this: X ÷ 6 χ□ = 18 χ□, X= ().

8. The sum of three consecutive odd numbers is 33, and these three numbers are () respectively.

9. A package has one kilogram of rice, and B package has one kilogram of rice. If 8 kg is poured out of bag A and put into bag B, the weight of rice in the two bags is equal. It turns out that bag A is () kilograms heavier than bag B.

Second, the judgment is accurate. [10 point]

1, the formula with unknown number is called equation. ( )

2. When both sides of an equation are divided by the same number at the same time, the result is still an equation. ( )

Add the same number on both sides of the equation at the same time, and the result is still an equation. ( )

4. Equation contains equation, and equation is only a part of equation. ( )

5. The solution of equation 1.5X=3 is X=0.5. ( )

Third, look at the graphic equation and answer. [16]

The area of parallelogram is 8.8 square meters, and that of rectangle is 4.32 square meters.

1. 1.8m

X meter x meter

The square is 3.2 meters in circumference, and a book has 182 pages.

I have read page X, and there are 78 pages left.

X meter

Four, according to the nature of the equation, fill in the operation symbol in ○ and fill in the number in □. (6 points)

X-35=60 X+ 17=57

X-35+35 = 60○□X+ 17- 17 = 57○□

X=□ X=□

X÷7= 105 0.9X=6.3

x÷7×7 = 105○□0.9x÷0.9 = 6.3○□

X=□ X=□

Fifth, solve the equation. [18]

7.6+X = 34.5 X-780 = 3 15 X÷0.4 = 35.2

4.5X=9 X+74= 102 7.5÷X= 0.25

Six, the column equation solves the text problem. (6 points)

1 and 15 are more than x 102, so find X.

The quotient of 24 divided by a number is 0.2. Find this number.

Seven, column equation to solve application problems. [25 points, 5 points for each question]

1, the coal yard shipped 1.5 tons of coal in the morning, and there was still some in the afternoon. One day, * * * shipped 4.3 tons of coal, how many tons in the afternoon?

2. The sum of three consecutive odd numbers is 57, and the middle number is m. Can you make an equation to find the value of m?

The piano has 48 black keys, 26 less than the white keys. How many white keys are there?

The speed of the car on the expressway is 90 kilometers per hour, which is twice the speed of the ordinary highway. How many kilometers does this car travel per hour on ordinary roads?

It takes 4 hours for a ship to reach its destination from port A to port B. It is known that the waterway between the two ports is128km long. How many kilometers does this ship travel per hour? 、

6. One third of Xiao Ming's extracurricular books are one quarter of Xiao Hong's. How many books have Xiao Ming and Xiao Hongge read?

See for yourself, give me the QQ number and I'll send the answer!