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

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"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 on this day? List the equations.

hint:

Since subtraction is the inverse operation of addition, we ask how much 4 - (-3) is equal to, that is, what number plus (-3) equals 4, that is? +(-3)=4.

Calculate the following equations:

50 - 20 = 30

50 - 10 = 40

50 – 0 = 50

50 - (-10) = 60

50 - (-20) = 70

Calculate each of the following questions:

(1) 9-(-5)

(2) 0 – 8

(3)(-3)-1

(4) (-5) - (-5)

(5)(-3)-(-7)

(6)(-4)-16

Class exercises:

1 oral calculation (1) 3 - 5; (2) 3 - (- 5);

(3)(-3)-5; (4)(-3)-(-5);

(5)-6-(-6); (6)-7-0;

(7)0-(-7); (8)(-6)-6;

(9)9-(-11);

What have you gained?

1. Be proficient in rational number subtraction. When using the rules to change subtraction into addition, pay attention to two changes: first, the minus sign becomes a plus sign, and second, the subtrahend becomes its opposite.

2. Read practical problems carefully, list subtraction formulas, and solve practical problems.

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"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:

"Subtraction of Rational Numbers" Rational Numbers and Their Operations PPT Courseware Review Calculation (1) 4 + 16= (2) (2) + (27) = (3) (9) + 10 = (4) 45 + (60) = ( 5) (7) + 7 = (6) 16 + 0 = (7) 0 + (8) = (1) ..

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Update Time: 2024-11-21

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

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