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Transcript 
ADDING INTEGERS
 Positive
+ Positive = Positive
 ( +3) + (+2) = +5
 When
a number is positive, you do
not have to use the (+) sign.
 (+3) + (+2) = 5
ADDING TWO NEGATIVE
NUMBERS
 Negative
+ Negative = Negative
 (- 6) + (- 3) = - 9
 When
a number is NEGATIVE, you do
have to use the (-) sign.
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
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.
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
= -3
Subtract the numbers without
negative signs.
Keep the sign of the larger
number.
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
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.
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
= -3
Subtract the numbers
without negative signs.
Keep the sign of the larger
number.
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
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.
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.
Keep the sign of the larger
number.
=2
Remember For Addition:

When the signs are the same, add and
keep the sign:
• 2+2= 4
• -2+(-2)= -4

When the signs are different, subtract and
keep the sign of the larger number:
• 6+(-2)=
• -6+2=
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