1. Adding and Subtracting Integers
COURSE 2 LESSON 1-7
Use a number line to find each sum.
a. (–3) + 1
Start at 0. Move 3 units left.
Then move 1 unit right.
The sum is –2.
b. 1 + (–3)
Start at 0. Move 1 unit right.
Then move 3 units left.
The sum is –2.
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2. Adding and Subtracting Integers
COURSE 2 LESSON 1-7
Use a number line to find the sum.
–4 + (–2)
Start at 0. Move 4 units left.
Then move another 2 units left.
The sum is – 6.
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3. Adding and Subtracting Integers
COURSE 2 LESSON 1-7
Adding and Subtracting Integers
Find each sum.
a (–6)
|24| – |–6| Find the difference of the absolute values.
24 + (–6) = 18
Since 24 has a greater absolute value, the sum is positive.
b. –12 + (–19)
Since both integers are negative, the sum is negative.
–12 + (–19) = –31
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