Adding and Subtracting Integers

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Presentation transcript:

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. 1-7

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. 1-7

Adding and Subtracting Integers COURSE 2 LESSON 1-7 Adding and Subtracting Integers Find each sum. a. 24 + (–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 1-7