On a 50-foot roll of cable, 15 ft are left. How many feet of cable were used? Adding and Subtracting...
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On a 50-foot roll of cable, 15 ft are left. How many feet of cable were used? Adding and Subtracting Rational Numbers COURSE 3 LESSON 4-4 3 4 Let t = the amount used. Words amount left + amount used = original amount 3 4 Equation 15 + t = 50 4-4
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Transcript of On a 50-foot roll of cable, 15 ft are left. How many feet of cable were used? Adding and Subtracting...
On a 50-foot roll of cable, 15 ft are left. How many feet of
cable were used?
Adding and Subtracting Rational NumbersAdding and Subtracting Rational NumbersCOURSE 3 LESSON 4-4COURSE 3 LESSON 4-4
34
Let t = the amount used.
Words amount left + amount used = original amount
34Equation 15 + t = 50
4-4
(continued)
Adding and Subtracting Rational NumbersAdding and Subtracting Rational NumbersCOURSE 3 LESSON 4-4COURSE 3 LESSON 4-4
Subtract 15 from each side.t = 50 – 1534
34
The amount of cable used was 34 ft.14
4-4
15 + t = 5034
Rewrite 50 as 49 + , or 1. Subtract. t = 49 – 15 = 3444
34
44
14
Adding and Subtracting Rational NumbersAdding and Subtracting Rational Numbers
Find each sum or difference.
1. – 2. + 3. – 4. 4 – 1
5. It snowed 2 in. on top of 4 in. of snow already on the ground.
How deep is the snow now?
13
7 in.
COURSE 3 LESSON 4-4COURSE 3 LESSON 4-4
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45
23
78
12
56
14
38
7 15
1 7 12
3
4-4
12
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