1. 1-7 Adding and Subtracting Integers
Miss Tilton

2. 1-7 Adding Integers Examples: Adding zero does not change an integer:
Zero property
Examples:
– = – 12
0 + (– 88) = – 88

3. 1-7 Adding Integers Adding integers with the same sign:
Find the sum
Keep the sign
Find the sum of – 5 + – 2

4. 1-7 Adding Integers Examples of addition with the same sign:
3 + 5 = 8
– 3 + (– 5) = – 8
– 50 + – – 5 = – 157
Try these…
– 1 + (– 23) = – 5 + (– 2) + (– 7) =
– – 14

5. 1-7 Adding Integers Adding integers with different signs:
Find the difference (of the absolute values)
Use the sign of the number with the larger absolute value
Find the sum of – 4 + 5

6. 1-7 Adding Integers
Find the sum of 5 + (- 4)

7. 1-7 Adding Integers Examples of addition with different signs:
9 + – 6 = 3
– = – 29
– – 14 = – 14
Try these…
2 + (– 10) = – (– 39) =
– – 18

8. 1-7 Adding Integers
If you have no money on Monday. Your mom lets you borrow $ 8 on Tuesday, and you pay her back from the $ 10 you earn on Wednesday, how much money do you have?