1. POSITIVE AND NEGATIVE NUMBERS
LESSON 6

2. ADDING INTEGERS Positive + Positive = Positive ( +3) + (+2) = +5
When a number is positive, you do not have to use the (+) sign.
(+3) + (+2) = 5

3. ADDING TWO NEGATIVE NUMBERS
Negative + Negative = Negative
(- 6) + (- 3) = - 9
When a number is NEGATIVE, you do have to use the (-) sign.

4. ADDING POSITIVE AND NEGATIVE INTEGERS
Sum of a negative and a positive number - Keep the sign of the larger number and subtract
EXAMPLE 1:
(- 6) + 3 = -3
COPY DOWN QUESTION

5. ADDING POSITIVE AND NEGATIVE INTEGERS
Sum of a negative and a positive number - Keep the sign of the larger number and subtract
EXAMPLE 1:
(- 6) + 3 = -3
COPY DOWN QUESTION
6 – 3 = 3
Subtract the numbers without negative signs.

6. ADDING POSITIVE AND NEGATIVE INTEGERS
Sum of a negative and a positive number - Keep the sign of the larger number and subtract
EXAMPLE 1:
(- 6) + 3 = -3
COPY DOWN QUESTION
6 – 3 = 3
Subtract the numbers without negative signs.
= -3
Keep the sign of the larger number.

7. ADDING POSITIVE AND NEGATIVE INTEGERS
Sum of a negative and a positive number - Keep the sign of the larger number and subtract
EXAMPLE 2:
9 + (-12) = - 3
COPY DOWN QUESTION

8. ADDING POSITIVE AND NEGATIVE INTEGERS
Sum of a negative and a positive number - Keep the sign of the larger number and subtract
EXAMPLE 2:
9 + (-12) = - 3
COPY DOWN QUESTION
12 – 9 = 3
Subtract the numbers without negative signs.

9. ADDING POSITIVE AND NEGATIVE INTEGERS
Sum of a negative and a positive number - Keep the sign of the larger number and subtract
EXAMPLE 2:
9 + (-12) = - 3
COPY DOWN QUESTION
12 – 9 = 3
Subtract the numbers without negative signs.
= -3
Keep the sign of the larger number.

10. ADDING POSITIVE AND NEGATIVE INTEGERS
Sum of a negative and a positive number - Keep the sign of the larger number and subtract
EXAMPLE 3:
(- 5) + 7 = 2
COPY DOWN QUESTION

11. ADDING POSITIVE AND NEGATIVE INTEGERS
Sum of a negative and a positive number - Keep the sign of the larger number and subtract
EXAMPLE 3:
(- 5) + 7 = 2
COPY DOWN QUESTION
7 – 5 = 2
Subtract the numbers without negative signs.

12. ADDING POSITIVE AND NEGATIVE INTEGERS
Sum of a negative and a positive number - Keep the sign of the larger number and subtract
EXAMPLE 3:
(- 5) + 7 = 2
COPY DOWN QUESTION
7 – 5 = 2
Subtract the numbers without negative signs.
= 2
Keep the sign of the larger number.

13. SUBTRACTING INTEGERS Negative - Positive = Negative
(same as adding two negative numbers)
(- 8) - 3 = -8 + (-3) = -11
Another way of saying this:
ADD THE OPPOSITE

14. SUBTRACTING INTEGERS
Positive - Negative = Positive + Positive = Positive
4 - (-3) = = 7
Once again you are adding the opposite

15. SUBTRACTING INTEGERS Negative - Negative = Negative + Positive =
Keep the sign of the larger number and subtract
(-7) - (-5) = ( -7) + 5 = -2
(-5) - ( -7) = (-5) + 7 = 2

16. TRY THESE ADD SUBTRACT 1) (+6) + (-2) 1) (7) – (2) 2) (+7) + 3
2) (+8) – (-2)
3) (-5) + (+2)
3) (-9) – (+3)
4) (-6) – (-2)

17. ADD
SUBTRACT
1) (+6) + (-2) = 4
1) (7) – (2)
2) (+7) + 3
2) (+8) – (-2)
3) (-5) + (+2)
3) (-9) – (+3)
4) (-6) – (-2)

18. ADD
SUBTRACT
1) (+6) + (-2) = 4
1) (7) – (2)
2) (+7) + 3 = 10
2) (+8) – (-2)
3) (-5) + (+2)
3) (-9) – (+3)
4) (-6) – (-2)

19. TRY THESE ADD SUBTRACT 1) (+6) + (-2) = 4 1) (7) – (2)
2) (+7) + 3 = 10
2) (+8) – (-2)
3) (-5) + (+2) = -3
3) (-9) – (+3)
4) (-6) – (-2)

20. ADD
SUBTRACT
1) (+6) + (-2) = 4
1) (7) – (2) = 5
2) (+7) + 3 = 10
2) (+8) – (-2)
3) (-5) + (+2) = -3
3) (-9) – (+3)
4) (-6) – (-2)

21. ADD
SUBTRACT
1) (+6) + (-2) = 4
1) (7) – (2) = 5
2) (+7) + 3 = 10
2) (+8) – (-2)
= (+8) + (+2)
3) (-5) + (+2) = -3
3) (-9) – (+3)
4) (-6) – (-2)

22. ADD
SUBTRACT
1) (+6) + (-2) = 4
1) (7) – (2) = 5
2) (+7) + 3 = 10
2) (+8) – (-2)
= (+8) + (+2)
= 10
3) (-5) + (+2) = -3
3) (-9) – (+3)
4) (-6) – (-2)

23. ADD
SUBTRACT
1) (+6) + (-2) = 4
1) (7) – (2) = 5
2) (+7) + 3 = 10
2) (+8) – (-2)
= (+8) + (+2)
= 10
3) (-5) + (+2) = -3
3) (-9) – (+3)
= (-9) + (-3)
4) (-6) – (-2)

24. ADD
SUBTRACT
1) (+6) + (-2) = 4
1) (7) – (2) = 5
2) (+7) + 3 = 10
2) (+8) – (-2)
= (+8) + (+2)
= 10
3) (-5) + (+2) = -3
3) (-9) – (+3)
= (-9) + (-3)
= - 12
4) (-6) – (-2)

25. ADD
SUBTRACT
1) (+6) + (-2) = 4
1) (7) – (2) = 5
2) (+7) + 3 = 10
2) (+8) – (-2)
= (+8) + (+2)
= 10
3) (-5) + (+2) = -3
3) (-9) – (+3)
= (-9) + (-3)
= - 12
4) (-6) – (-2)
= (-6) + (2)

26. ADD
SUBTRACT
1) (+6) + (-2) = 4
1) (7) – (2) = 5
2) (+7) + 3 = 10
2) (+8) – (-2)
= (+8) + (+2)
= 10
3) (-5) + (+2) = -3
3) (-9) – (+3)
= (-9) + (-3)
= - 12
4) (-6) – (-2)
= (-6) + (2)
= -4