| Category | Format | Size |
|---|---|---|
| Beijing Normal University Edition Seventh Grade Mathematics Volume 1 | pptx | 6 MB |
"Subtraction of Rational Numbers" Rational Numbers and Their Operations PPT Courseware 2
Description
"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 subtracting rational numbers. When using 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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For more information about the "Rational Numbers and Their Operations Subtraction of Rational Numbers" PPT courseware, please click on the Rational Numbers and Their Operations PPT Subtraction of Rational Numbers PPT tag.
"Subtraction of Rational Numbers" Rational numbers and their operations PPT download:
"Subtraction of Rational Numbers" Rational Numbers and Their Operations PPT Download Part 1 Content: Review of Old Knowledge Rational Number Addition Rules When two numbers with the same sign are added, the absolute value adds the same sign; when the sign of different signs is added, the larger one decreases, and the sign follows the larger one; for two opposite numbers To sum the numbers, if the result is zero, remember...
"Subtraction of Rational Numbers" Rational numbers and their operations PPT:
"Subtraction of Rational Numbers" Rational Numbers and Their Operations PPT Part 1 Content: Knowledge Points Basic Knowledge Point 1 Subtraction Operation of Rational Numbers 1. The following calculations are correct (D) A.-1-1=0 B.7-(-7) =0 C.-3-( +3 )=6 D.0-( -4 )=4 2. The following statements..
"Subtraction of Rational Numbers" Rational Numbers PPT Courseware (Lesson 2):
"Subtraction of Rational Numbers" Rational Numbers PPT Courseware (Lesson 2) Part One: Learning Objectives: Understand the meaning of unifying the addition and subtraction of rational numbers into addition, and be able to skillfully perform mixed operations of addition and subtraction of rational numbers (key points); be able to use the addition of rational numbers Subtraction solves simple...
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Update Time: 2024-06-30
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