"Subtraction of Rational Numbers" Rational Numbers and Their Operations PPT Courseware

Description

"Subtraction of Rational Numbers" Rational Numbers and Their Operations PPT Courseware

Review calculations

(1) 4 + 16=

(2)(–2)+(–27)=

(3) (–9) + 10 =

(4) 45 + (–60) =

(5) (–7) + 7 =

(6) 16 + 0 =

(7) 0 + (–8) =

(1) To add two numbers with the same sign, take the same sign and add the absolute values.

(2) To add two numbers with different signs whose absolute values ​​are not equal, take the sign of the addend with the larger absolute value, and subtract the smaller absolute value from the larger absolute value. Add two numbers that are opposites of each other. Got 0.

(3) If you add a number to 0, you still get this number.

Question 1

(1) (+10)-(+3)=

(2) (+10)+(-3)=

So we get: (+10)-(+3)=(+10)+(-3)

What are the characteristics of this equation? What do students understand about subtraction from equations?

Answer: The left side of the equation is the subtraction operation, and the right side is the addition operation. The subtraction operation is converted into an addition operation.

Can all subtractions be converted into addition operations?

Question 2

(1)(–2)+(–8)=

(2)(–10)–(–8)=

(3) (–10) + ( +8 ) =

Keywords: Rational numbers and their operations courseware, subtraction of rational numbers courseware, Beijing Normal University edition seventh grade mathematics volume PPT courseware, seventh grade mathematics slide courseware download, rational numbers and their operations PPT courseware download, subtraction of rational numbers PPT courseware download, .ppt Format

For more information about the PPT courseware "Subtraction of Rational Numbers, Rational Numbers and Their Operations", please click the Subtraction of Rational Numbers ppt Rational Numbers and their Operations ppt tag.

"Subtraction of Rational Numbers" PPT courseware:

"Subtraction of Rational Numbers" PPT courseware Question 1: The highest temperature in Hohhot in one day is 19 ℃, and the lowest temperature is 7 ℃. What is the temperature difference in Hohhot during this day? How to calculate? Question 2: The highest temperature in Xiamen is 9 ℃, and the highest in Harbin...

"Subtraction of Rational Numbers" Rational Numbers and Their Operations PPT Courseware 2:

"Subtraction of Rational Numbers" Rational Numbers and Their Operations PPT Courseware 2 The highest temperature in Urumqi is 4 degrees, and the lowest temperature is 3 degrees (1) What is the temperature difference in Urumqi today? List the equations. Tip: Since subtraction is the inverse operation of addition, 4 - (-3) is required..

File Info

Update Time: 2024-11-21

This template belongs to Mathematics courseware Beijing Normal University seventh grade first volume mathematics industry PPT template

Preview