1. Dividing Whole Numbers
Chapter 1 / Whole Numbers and Introduction to Algebra
Section 1.6
Dividing Whole Numbers

2. Martin-Gay, Prealgebra, 5ed
The process of separating a quantity into equal parts is called division.
quotient
dividend
divisor
Martin-Gay, Prealgebra, 5ed

3. Division Properties of 1
The quotient of any number
and that same number is 1. 6 1 5 7 =
Martin-Gay, Prealgebra, 5ed

4. Division Properties of 1 . . .
The quotient of any number and 1 is that same number. 6 1 5 7 =
Martin-Gay, Prealgebra, 5ed

5. Division Properties of 0
The quotient of 0 and any number (except 0) is 0. 6 7 = 5
Martin-Gay, Prealgebra, 5ed

6. Division Properties of 0 . . .
The quotient of any number and 0 is not a number. We say that 6 5 7
are undefined.
Martin-Gay, Prealgebra, 5ed

7. Martin-Gay, Prealgebra, 5ed
Helpful Hint
Since division and multiplication are reverse operations, don’t forget that a division problem can be checked by multiplying.
Martin-Gay, Prealgebra, 5ed

8. Chapter 1 / Whole Numbers and Introduction to Algebra
Here are some key words and phrases that indicate the operation of division.
Key Words
Examples
Symbols
divide
divide 15 by 3
15  3
quotient
quotient of 12 and 6
divided by
8 divided by 4
divided or shared equally
$20 divided equally among five people
20  5

9. Chapter 1 / Whole Numbers and Introduction to Algebra
How do you find an average?
A student’s prealgebra grades at the end of the semester are: 90, 85, 95, 70, 80, 100, 98, 82, 90, 90.
How do you find his average?
Find the sum of the scores and then divide the sum by the number of scores.
Sum = 880
Average = = 88
Martin-Gay, Prealgebra, 5ed