For the rational number a b define the operation a b ab a b, then 4 x .

3x+2y-5x-7y

Mixed addition, subtraction, and operation of rational numbers.

About rational number calculation questions and answers.

Who has a rational number calculation problem in the first year of junior high school (I want 1000 questions).

Write a primary school mathematics teaching software, mainly to test the lower grades of primary school.

Check out the same topic question: Mixed operations on rational numbers.

Others: 1 in total.

1 Calculation Questions.

2.Calculation problem: (10 5 = 50).

3x+2y-5x-7y

1) Calculation Questions:

16)4a)*(3b)*(5c)*1/6

a^3-2b^3+ab(2a-b)

a^3+2a^2b-2b^3-ab^2

a^2(a+2b)-b^2(2b+a)

a+2b)(a^2-b^2)

a+2b)(a+b)(a-b)

x^2+y^2)^2-4y(x^2+y^2)+4y^2(x^2+y^2-2y)^2

x^2+2x)^2+3(x^2+2x)+x^2+2x+3(x^2+2x)^2+4(x^2+2x)+3(x^2+2x+3)(x^2+2x+1)

x^2+2x+3)(x+1)^2

a+1)(a+2)+(2a+1)(a-2)-12a^2+3a+2+2a^2-3a-2-123a^2-12

3(a+2)(a-2)

x^2(y+z)^2-2xy(x-z)(y+z)+y^2(x-z)^2

x(y+z)-y(x-z)]^2

xz+yz)^2

z^2(x+y)^2

3(a+2)^2+28(a+2)-20

3(a+2)-2][(a+2)+10]

3a+4)(a+12)

a+b)^2-(b-c)^2+a^2-c^2(a+b)^2-c^2+a^2-(b-c)^2(a+b+c)(a+b-c)+(a+b-c)(a-b+c)(a+b-c)(a+b+c+a-b+c)

2(a+b-c)(a+c)

x(x+1)(x^2+x-1)-2

x^2+x)(x^2+x-1)-2

x^2+x)^2-(x^2+x)-2

x^2+x-2)(x^2+x+1)

x+2)(x-1)(x^2+x+1)

I did my best!

Solution: When a--2, b=3.

Original = (-2) 3-(-2)-3-2

9 A: The value is -9.

Solution: Original formula = (-2) * 3 - (-2) -3-2 = (-6) + 2-3-2 = -9

Note: The method is mainly to use -2 to replace a in the formula, and 3 to replace b. in the formula

a b = ab a-b is at -3, where a-b should be the whole denominator.

Let a = 4, b = 6, and 4 6 = 4 6 (4-6) 3 = 12 3 = 15

(-4)*2, i.e., a=-4, b=2

Then (-4)*2=(-4) 2-(-4) 2=-8+2

6. If you don't understand something, you can ask me, and if you are satisfied, please adopt it. Thanks!