Page 35 - Math Course 1 (Book 1)

Dividing Integers

Mo. 1

Lesson 6

MO. 1 - L6a

Dividing Integer KEY CONCEPTS:
1. Dividing Integers.
The same and Different Sign 2. Finding the Average of a Set of Data.

Key Concept

Dividing Integers with the Dividing Integers with
Same Sign Different Sign
Words: The quotient of two integers with the Words: The quotient of two integers with
same sign is positive. different sign is negative.

Examples: -12 ÷ (-3) = 4 Examples: -12 ÷ (4) = -3

12 ÷ 3 = 4 12 ÷ (-4) = -3

Concept Summary Operation with Integers

Words Examples

Adding Two Integers
To add integers with the same sign, add their absolute -5 + ( -4 ) = -9 5 + 4 = 9
value. Give the result the same sign as the integers.

To add integers with different signs, subtract their -5 + 4 = -1 5 + (-4) = 1
absolute values. Give the result the same sign as the
integer with the greater absolute value.

Subtracting Two Integers 5 - 9 = 5 + (-9) or -4
To subtract an integer, add its additive inverse.
5- (-9) = 5 + 9 or 14

Multiplying Two Integers
.
.
The product of two integers with the same sign is 5 4 = 20 -5 (-4) = 20
positive.
.
.
The product of two integers with different sign is -5 4 = -20 5 (-4) = -20
negative.

Dividing Two Integers
÷
÷
The quotient of two integers with the same signs is 20 5 = 4 -20 (5) = 4
positive.
The quotient of two integers with different signs is -20 5 = -4 20 (-5) = -4
÷
÷
negative.

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