Subtracting Rational Numbers
Presentation
•
Mathematics
•
6th - 8th Grade
•
Practice Problem
•
Medium
Standards-aligned
Used 143+ times
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7 Slides • 7 Questions
1
Subtracting Rational Numbers
Lesson 1-5
2
Subtracting Rational Numbers
To subtract rational numbers, follow the same rules as subtracting integers.
KCO
Keep, Change, Opposite
3
Subtracting Rational Numbers
4
Subtracting Rational Numbers
Find 12.8 – 21.6
12.8 + (-21.6)
21.6 – 12.8
-8.8
5
Multiple Choice
31−(−31)
31
−32
0
32
6
Multiple Choice
−331−65
−461
−221
461
221
7
Multiple Choice
421−541
43
943
−43
−943
8
Multiple Choice
-8.4 - 6.7
1.3
-15.1
15.3
-1.3
9
Multiple Choice
-20.5 - (-20.5)
1
-41
41
0
10
Multiple Choice
0.41 - (-0.07)
0.48
-0.48
0.34
-0.34
11
Finding Distance
12
Finding Distance
13
Finding Distance
•In the water, the bottom of a boat is 2.1 feet below the surface, and the top of the boat is 8.7 feet above it. Towed on a trailer, the bottom of the boat is 1.3 feet above the ground. Can the boat and the trailer pass under the bridge?
•Find the height of the boat.
•8.7- (-2.1) = 8.7 + 2.1 = 10.8
•Find the height of the boat and the trailer.
•10.8 + 1.3 = 12.1
•12.1 is greater than 11 ft 8 in, so the trailer and the boat cannot pass.
14
Multiple Choice
Find the distance between -7.5 and -15.3 on a number line.
22.8
7.8
-22.78
-7.8
Subtracting Rational Numbers
Lesson 1-5
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