
Lesson 1.5
Presentation
•
Mathematics
•
7th Grade
•
Hard
Joseph Anderson
FREE Resource
7 Slides • 5 Questions
1
Lesson 1.5
Add and Subtract Rational Numbers
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Definition:
Rational Number: A rational number is any number that can be written as a fraction of two integers where the denominator is non-zero.
Examples: Any fraction, any integer, any repeating or terminating decimals.
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Today's Goal:
In this lesson, we will take what we learned from adding and subtracting integers and apply that to rational numbers as well.
Note: The rules are the exact same.
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5
Multiple Choice
Solve:
2 43−4 41
−2 41
2 41
−1 21
1 21
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Multiple Choice
−5 41−(−6 21)
−1 41
1 41
−11 43
11 43
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Solve: -2.5 - (6.8)
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Multiple Choice
Solve: 14.8 - (-32.4)
17.6
-17.6
47.2
-47.2
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Multiple Choice
25.27 - 35.42
60.69
-60.69
10.15
-10.15
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Example: The temp in a town is 36.6 degrees during the day and (-12.6) degrees at night. What is the temp change from day to night?
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Multiple Choice
The temp at RMS is 102 degrees during the day and -14 degrees at night (not really). What is the difference in the temp from day to night?
88 degrees
-88 degrees
116 degrees
-116 degrees
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Conclusion: Two complete sentences about what you learned.
I learned when adding or subtracting rational numbers the rules are ______ as adding or subtracting integers.
To add or subtract fractions I must make sure the _____ is the same.
When adding or subtracting decimals, I make sure to _____ the decimal places.
Lesson 1.5
Add and Subtract Rational Numbers
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