Dividing Integers

Dividing Integers

Lesson 1.5

Division of Integers

• Rule #1:

  The quotient of two positive integers is positive.

  18÷6 = 3

• Rule #2:

  The quotient of two negative integers is positive.

  -18÷(-6) = 3

• Rule #3:

  The quotient of a positive integer and a negative integer is negative.

  18 ÷ (-6) = -3

Multiple Choice

14 ÷ 7

• 2

• -2

• 7

• -7

Multiple Choice

-32 ÷ (-4)

• 6

• -8

• 8

• -6

Multiple Choice

-40 ÷ (-8)

• -5

• 6

• -6

• 5

Multiple Choice

0 ÷ (-6)

• -6

• 0

• 6

• -0

Multiple Choice

-49 ÷7

• 8

• 7

• -7

• -8

Multiple Choice

21 ÷ (-3)

• -7

• 7

• -8

• 8

Using Order of Operations

• -2 - 8 ÷ 4 +5

• PEMDAS

• -2 - 2 + 5

• -2 + (-2) + 5

• -4 + 5

• 1

Evaluating an Expression

• Evaluate 10 - x² ÷ y when x = 8 and y = -4.

• 10 - 8² ÷ (-4)=

• 10 – 64 ÷ (-4)=

• 10 – (-16)=

• 10 + 16=

• 26

Multiple Choice

 $\frac{-18\ ÷\ 6}{3}$  

• 3

• 1

• -1

• -3

Multiple Choice

 $\frac{\left(-6\right)^2}{-18}\ +\ 4$  

• -2

• 2

• 6

• -6

Multiple Choice

24 ÷(-8) + (-3) •(-2)

• 12

• -3

• 3

• -12

Finding the Mean

• Find the total and divide by the amount of numbers.

• -4, -2, 5, 8, -6, 11

• Add the negatives:

  -4+(-2)+(-6) = -12

• Add the positives:

  5+8+11= 24

• Use integer rules:

  24 + (-12)

  24 - 12 = 12

• There are 6 numbers so, 12 ÷ 6 = 2.