Class name score

Fill in the blanks. (1×24=24 points)

1. Equations with unknowns are called equations. For example, () and () contain both unknowns and equations, so they are all equations.

2. The value of the unknown that makes the left and right sides of the equation equal is called the solution of the equation. For example, when x is (), the left and right sides of equation 6X= 18 are equal, so the solution of 6X= 18 is ().

3. () is the solution of equation 2.4+X=3.6, and the solution of equation 1.25X=8 ().

4. If 50+X= 150, then 50÷X= () and X×0.25= ().

5. Complete the following categories according to the properties of the equation.

( 1)A+35=80，A+35- 14 = 80-()； M-35 = 80m +X-35=80+ ().

(2)6X=3，6X÷6=3÷()，X÷2.5=8，X÷2.5×2.5=8×.

6. The sum of three consecutive odd numbers is 27, in which the smallest number is () and the largest number is ().

7. The rectangle has an area of 28 square meters and a length of 7 meters. What is the width? If the width is x meters. Equation () or () can be enumerated.

8. If □ +□ +□ +△ = 25 and □ +□ +△ +△ = 22, then □ = () and △ = ().

9. fill in ">", "

(1) when X=64, X+ 14() 50, X- 14( )50, X \ 14()50.

(2) When X=0.3, X÷0.6 ()0.5, 0.6 x () 0.5 0.6 x () 0.5.

Second, choose. (2×5= 10 point)

1, in the following formula, () is an equation. a、4.5-X B、5X & gt； 12 C、X+ 12=78

2. When X=88, X+ 15() 100. a 、> B 、= C 、