1. Dividing Whole Numbers
1.6
Dividing Whole Numbers

2. Division quotient divisor dividend
The process of separating a quantity into equal parts is called division.
quotient
dividend
divisor

3. Division Properties of 1
The quotient of any number, except 0, and that same number is 1. 6 1 5 7 = ÷

4. Division Properties of 1
The quotient of any number and 1 is that same number. 6 1 5 7 = ÷

5. Division Properties of 0
The quotient of 0 and any number (except 0) is 0. 6 7 = ÷ 5

6. Division Properties of 0
The quotient of any number and 0 is not a number. We say that 6 5 7 ÷
are undefined.

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

8. Chapter 1 / Whole Numbers and Introduction to Algebra
Division Words
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
Average
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 = 880 ÷ 10 = 88