"Addition and Subtraction of Integer Formulas" PPT on Integral Formulas and Their Addition and Subtraction (Lesson 3)

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"Addition and Subtraction of Integer Formulas" PPT on Integral Formulas and Their Addition and Subtraction (Lesson 3)

Part One Content: Basic Knowledge Key Points

Knowledge point 1: Addition and subtraction of integers

1. The result of simplifying 7(x+y)-5(x+y) is (A)

A.2x+2y B.2x+y

C.x+2y D.2x-2y

2. It is known that the sum of a polynomial and 3x2+9x is equal to 5x2+4x-1, then this polynomial is (D)

A.8x2+13x-1 B.-2x2+5x+1

C.8x2-5x+1 D.2x2-5x-1

3. It is known that A=x2-2xy, B=y2+3xy, then simplify 2A-3B= 2x2-13xy-3y2.

PPT on addition and subtraction of integers, part 2: improvement of comprehensive abilities

7. If A is a fifth-order polynomial and B is a fourth-order polynomial, then A+B must be (C)

A. A polynomial of degree no less than nine

B. Fourth degree polynomial

C. quintic integer

D. The number of times is variable

8. It is known that the positions of the rational numbers a and b on the number axis are as shown in the figure, then the result of simplifying the algebraic formula |a+b|-|a-b| is (C)

A.-b B.a C.-2b D.2a-b

9. The sum of polynomial x3-2x2+5x+3 and polynomial 2x2-x3+4+9x must be (D)

A. Odd number B. Even number

C. Multiples of 2 and 7 D. None of the above are correct

10. It is known that P=3ax-8x+1, Q=x-2ax-3, no matter what value x takes, 3P-2Q=9 is always true, then the value of a is (D)

A.-3 B.-2 C.0 D.2

11. Xiaobai is a sloppy kid. When he calculated the subtraction of 3a2+7b from an integer, he regarded the subtraction as addition. The result was -2a+1, so the correct result should be 6a2+2a+14b-1.

Addition and subtraction of integers PPT, the third part: Expansion, exploration and breakthrough

13. It is known that A=2x2+3xy-2x-1, B=-x2+xy-1.

(1) Find the value of A+2B;

(2) If the value of A+2B has nothing to do with x, find the value of y.

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For more information about the PPT courseware "Integers and their addition and subtraction of integers", please click the Integers and their addition and subtraction PPT Addition and subtraction of integers PPT tab.

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Update Time: 2024-11-22

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