Example 1: Modeling Integer Subtraction Course 2 Subtracting Integers Example 1: Modeling Integer Subtraction Use a number line to find each difference. –3 – 1 –1 –3 1 2 –6–5–4 –3 –2–1 0 Start at 0. Move 3 spaces left. To subtract 1, move to the left. –3 – 1 = –4

Subtracting Integers Example 2 Find each difference. 1. –2 – (–4) Course 2 Subtracting Integers Example 2 Find each difference. 1. –2 – (–4) –(–4) –2 1 2 3 4 –4 –3 –2–1 0 Start at 0. Move left 2 spaces. To subtract –4, move to the right. –2 – (–4) = 2

Insert Lesson Title Here Course 2 Subtracting Integers Insert Lesson Title Here Example 3 Use a number line to find each difference. –2 – 4 –4 –2 1 2 –6–5–4 –3 –2–1 0 Start at 0. Move 2 spaces left. To subtract 4, move to the left. –2 – 4 = –6

Insert Lesson Title Here Course 2 Subtracting Integers Insert Lesson Title Here Example 4 Use a number line to find each difference. –4 – (–2) –(–2) –4 1 2 3 4 –4 –3 –2–1 0 Start at 0. Move left 4 spaces. To subtract –2, move to the right. –4 – (–2) = –2

Subtracting Integers Addition and subtraction are inverse Course 2 Subtracting Integers Addition and subtraction are inverse operations—they “undo” each other. Instead of subtracting a number you can add its opposite.

Insert Lesson Title Here Course 2 Subtracting Integers Insert Lesson Title Here Example 4 Find the difference between 8°F and –5°F. 8 – (–5) 8 + 5 = 13 Add the opposite of 5. The difference in temperature is 13˚F.

Subtracting Integers Practice Find each difference. A. 5 – (–2) 5 + 2 Course 2 Subtracting Integers Practice Find each difference. A. 5 – (–2) 5 + 2 Add the opposite of –2. 7 B. –3 – 7 –3 + (–7) Add the opposite of 7. –10 C. – 1 – (–8) –1 + 8 Add the opposite of –8. 7

Insert Lesson Title Here Course 2 Subtracting Integers Insert Lesson Title Here Practice Find each difference. A. 4 – 2 4 + (–2) Add the opposite of 2. 2 B. –2 – (–6) –2 + 6 Add the opposite of –6. 4 C. –1 – 4 –1 + (–4) Add the opposite of 4. –5