Adding Integers
21 + 15
21 + 15 = 36
50 - 28
22
Basic math, subtract like normal.
7 x 7
Positive times positive equals positive
7 x 7 = 49
50 / 5
Positive divided by a positive is positive
50 / 5 = 10
When multiplying or dividing by two numbers that have the same sign, your answer will always be?
For example, positive times positive or negative divided by negative
Positve
-12 + -20
12 + -20
20 - 12 = 8
Keep the answer negative because negative 20 is father from 0 than 12.
12 + -20 = -8
-18 - 9
KEEP CHANGE CHANGE
-18 - 9
-18 + (-9)
When adding two numbers with the same sign, you add the values and keep the sign.
-18 + -9 = -27
This means -18 - 9 = -27
-8 x -9
Negative times negative equals positive.
-8 x -9 = 72
-64 / -8
Negative divided by a negative is positive.
-64/-8 = 8
When multiplying or dividing by two numbers that have different signs, your answer will always be?
For example, negative times positive or negative divided by positive
Negative
-20 + 8
-20 + 8
20 - 8 = 12
The answer is negative because 20 is father from 0 than 8
-20 + 8 = -12
15 - (-10)
KEEP CHANGE CHANE
15 - (-10)
15 + (10)
When adding two numbers with the same sign, you add the values and keep the sign.
15+ 10= 30
This means 15 - (-10) = 30
-6 x 12
Negative Times Positive is Negative.
-6 x 12 = 72
15 / -3
Positive divided by a negative is a negative.
15 / -3 = -5
Explain how you add two integers that have the same sign. For example positive plus positive, or negative plus negative.
SAME SIGN ADD
10 + -7
10 + -7
Different Sign Subtract
10 - 7 = 3
Your answer is positive because 10 is father away from 0 then -7.
10 + -7 + 3
-5 - (-5)
KEEP CHANGE CHANE
-5 - (-5)
-5 + (5)
When adding two numbers with different signs, you subtract the values and keep the sign of the number that is farther from 0.
-5 + 5 = 0 (ZERO PAIR - When adding opposite numbers)
This means -5 - (-5) = 0
3 x -6
Positive times negative is negative.
3 x -6 = -18
-35 / 7
Negative divided by a positive is a negative.
-35/7 = -5
Explain how we subtract integers. Examples negative minus positive.
KEEP CHANGE CHANGE
Keep the first number the same
Change subtraction to addition
Change the second number to is opposite
Solve the following problem. What two word phrase do we use to represent this type of question.
-9 + 9
Different Sign Subtract
9-9 = 0
Therefore -9 + 9 = 0
We call this a Zero Pair
-28 - (-45)
KEEP CHANGE CHANE
-28 - (-45)
-28 + (45)
When adding two numbers with different signs, you subtract the values and keep the sign of the number that is farther from 0.
45 - 28 = 17
Your answer is positive because positive 45 is farther from 0 then negative 28.
-28 + (45) = 17
This means -28 - (-45) = 17
-2 x -6 x -10
Negative times a negative is positive. Then you multiply your positive answer by a negative number so your answer goes back to being negative.
-2 x -6 = 12
12 x -10 = -120
100 / -5 /-4
Positive divided by a negative is a negative. Then a negative divided by a negative is a positive.
100 / -5 = -20
-20 / -4 = 5
Explain how you add two integers that have different signs. For example positive plus negative, or negative plus positive.
Different Sign Subtract! Subtract the absolute values of both number and keep the sign of the number that is farther away from zero.