8/7 × 2 1/ 16 + 1/2
10 1 × 1/5 – 1/5 × 2 1
50+ 160÷40 (58+370)÷(64-45)
120- 144÷ 18+35
347+45×2-4 160÷52
(58+37)÷(64-9×5)
95÷(64-45)
178- 145÷5×6+42 420+580-64×2 1÷28
8 12-700÷(9+3 1× 1 1)
( 136+64)×(65-345÷23)
85+ 14×( 14+208÷26)
(284+ 16)×(5 12-8208÷ 18)
120-36×4÷ 18+35
(58+37)÷(64-9×5)
(6.8-6.8×0.55)÷8.5
0. 12× 4.8÷0. 12×4.8
(3.2× 1.5+2.5)÷ 1.6
3.2×( 1.5+2.5)÷ 1.6
6- 1.6÷4= 5.38+7.85-5.37=
7.2÷0.8- 1.2×5= 6- 1. 19×3-0.43=
6.5×(4.8- 1.2×4)= 0.68× 1.9+0.32× 1.9
10. 15- 10.75×0.4-5.7
5.8×(3.87-0. 13)+4.2×3.74
32.52-(6+9.728÷3.2)×2.5
[(7. 1-5.6)×0.9- 1. 15] ÷2.5
5.4÷[2.6×(3.7-2.9)+0.62]
12×6÷( 12-7.2)-6 (4) 12×6÷7.2-6
102^2×4.5+8^5-√529
7.8×6.9+2.2×6.9
5.6×0.25
8×(20- 1.25)
127+352+73+44
89+276+ 135+33
25+7 1+75+29 +88
243+89+ 1 1 1+57
9405-2940÷28×2 1
920- 1680÷40÷7
690+47×52-398
148+3328÷64-75
360×24÷32+730
2 100-94+48×54
5 1+(2304-2042)×23
42 15+(436 1-7 16)÷8 1
(247+ 18)×27÷25
36-720÷(360÷ 18)
1080÷(63-54)×80
(528+9 12)×5-6 178
8528÷4 1×38-904
264+3 18-8280÷69
( 174+209)×26- 9000
8 14-(278+322)÷ 15
1406+735×9÷45
3 168-7828÷38+504
796-5040÷(630÷7)
285+(3000-372)÷36
1+5/6- 19/ 12
3x(-9)+7x(-9
(-54)x 1/6x(- 1/3)
18. 1+(3-0.299÷0.23)× 1
(6.8-6.8×0.55)÷8.5
0. 12× 4.8÷0. 12×4.8
(3.2× 1.5+2.5)÷ 1.6
3.2×( 1.5+2.5)÷ 1.6
5.6- 1.6÷4
5.38+7.85-5.37
7.2÷0.8- 1.2×5
6- 1. 19×3-0.43
6.5×(4.8- 1.2×4)
0.68× 1.9+0.32× 1.9
1 15- 10.75×0.4-5.7
5.8×(3.87-0. 13)+4.2×3.74
32.52-(6+9.728÷3.2)×2.5
[(7. 1-5.6)×0.9- 1. 15] ÷2.5
5.4÷[2.6×(3.7-2.9)+0.62]
12×6÷( 12-7.2)-6
12×6÷7.2-6
33.02-( 148.4-90.85)÷2.5
2. Solve the equation
2x=7(x-5)
8(3x+3)=240
4.74+4x-2.5x=8. 1
(2.8 1+x)÷2.8 1 = 1
15x-30= 16(x-2)
(-3)^3-3^3
(- 1)^2-5.6
2^2+3^3-4^4
(2^4-3^2)^3-5^5
[( 1.6^2-2^3)-2. 1]^2
(5.66×2)^2- 15^2
(- 15)^x=225,x=?
[(-4)^2-4^2]×2^2
[(-5.6)^2+3]^2
[5.6^2+(-5.6)^2]×(- 1)^2
3x+28-x=56
1.5x+6=3.75
2(3.6x+2.8)=- 1.6
9.5x+9.5= 19
18(x-35)=-36
x+7-(-36+8^2)/2=8+7^4/3
a-7-98+7a=3.2*5a
89/2+35/6x=3*9+2^3/5+7x
3X+ 189/3=52 1/2
4y+ 1 19*^3=22/ 1 1
3X* 189=5*4^5/3
8Z/6=458/5
3X+77=59
4Y-6985=8 1
87X* 13=5
7Z/93=4 1
15X+863-65X=54
58Y*55=27489
7(2x- 1)-3(4x- 1)= 4(3x+2)- 1
(5y+ 1)+( 1-y)=(9y+ 1)+( 1-3y)
[-6(-7^4*8)-4]=x+2
20%+( 1-20%)(320-x)= 320×40%
2(x-2)+2=x+ 1
2(x-2)-3(4x- 1)= 9( 1-x)
1 1x+64-2x = 100-9x
15-(8-5x)=7x+(4-3x)
3(x-7)-2[9-4(2-x)]=22
3/2[2/3( 1/4x- 1)-2]-x = 2
2x+7^2= 157
1) True or false:
Judge whether the following equation is a linear equation:
①-3x-6x2=7()
③5x+ 1-2x=3x-2()
④3y-4=2y+ 1。 ( )
Judge whether the solution of the following equation is correct:
① Solve equation 3y-4=y+3.
Solution: 3y-y=3+4, 2y=7, y=3.5.
② Solving equation: 0.4x-3=0. 1x+2.
Solution: 0.4x+0.1x = 2-3; 0.5x=- 1,x=-2
③ Solving the equation
Solution: 5x+ 15-2x-2 = 10, 3x =-3, x =-1;
④ Solving the equation
Solution: 2x-4+5-5x=- 1, -3x=-2, x=. ()
2) Fill in the blanks:
(1) If 2(3-a)x-4=5 is a linear equation about x, then a≦_
(2) The solution of equation ax=3 about X is a natural number, so the value of integer A is _
(3) The solution of equation 5x-2(x- 1)= 17 is _
(4) If x = 2 is the solution of equation 2x-3=m-, then m=_.
(5) If -2x2-5m+ 1=0 is a linear equation about x, then m=_.
(6) When y=_, the algebraic expressions 5y+6 and 3y-2 are reciprocal.
(7) When m=_, the solution of the equation is 0.
(8) If a≠0 is known, the solution of equation 3ab-(a+b)x=(a-b)x about x is _ _ _ _ _.
3) Multiple choice questions:
The solution of (1) equation ax=b is ().
A. there is a solution x = B. There are countless solutions
C. No solution D. When a≠0, x=
(2) Solve equation (x- 1)=3. Among the following variants, the simpler one is ().
A. multiply both sides of the equation by 4 to get 3( x- 1)= 12.
B. remove the brackets and get x- =3.
C. divide both sides by the same number to get x- 1=4.
D. finish, acquire
(3) Equation 2- Denominator ()
a . 2-2(2x-4)=-(x-7)b . 12-2(2x-4)=-x-7
C.12-2 (2x-4) =-(x-7) D. None of the above answers are correct.
(4) If the algebraic ratio is greater than 1, the value of x is ().
13 BC
(5)x= 1.5 is the solution of equation ().
A.4x+2=2x-(-2-9)
B.2{3[4(5x- 1)-8]-2}=8
C.4x+9 =6x+6
4) Answer the following questions:
When (1)x is equal to what number, are the values of algebraic expressions equal?
(2) When y is equal to what number, the value of the algebraic expression is 3 less than that of the algebraic expression?
(3) When m is equal to what number, the sum of the value of algebraic expression 2m- and the value of algebraic expression is equal to 5?
(4) Solve the following equation about x:
①ax+b = bx+a; (a≠b);
Three. Simplify and simplify the assessment
Cross-cultural assessment:
1 、-9(x-2)-y(x-5)
(1) simplifies the whole equation.
(2) When x=5, find the solution of y.
2、5(9+a)×b-5(5+b)×a
(1) simplifies the whole equation.
(2) When a=5/7, find the value of the formula.
3、62g+62(g+b)-b
(1) simplifies the whole equation.
(2) When g=5/7, find the solution of b.
4、3(x+y)-5(4+x)+2y
(1) simplifies the whole equation.
5 、( x+y)(x-y)
(1) simplifies the whole equation.
6、2ab+a×a-b
(1) simplifies the whole equation.
7、5.6x+4(x+y)-y
(1) simplifies the whole equation.
8、6.4(x+2.9)-y+2(x-y)
(1) simplifies the whole equation.
9 、( 2.5+x)(5.2+y)
(1) simplifies the whole equation.
10、9.77x-(5-a)x+2a
(1) simplifies the whole equation.
Substitute x =-2, y x=-2, y=0. 1, a=4, b= 1 4 and b= 1 into the following formulas for evaluation.
3(x+2)-2(x-3)
5(5+a)×b-5(5+b)×a
62a+62(a+b)-b
2ab+a×a-b
5.6x+4(x+y)-y
6.4(x+2.9)-y+2(x-y)
(2.5+x)(5.2+y)
9.77x-(5-a)x+2a
1. Is Guangdong Shantou Institute of Education a top three or a top three?
Shantou Institute of Education? There seems to be no such school now. You should be