Page 87 - Math Course 1 (Book 1)

Dividing Rational Numbers

Divide by a Fraction or Whole = 14 ( - 9 ( Multiply by the multiplicative
9
Number 3 28 inverse of - 28 - 28
9
Examples 1 14 3 9 Divide by common factors.
= ( - (
3 28
Find each quotient. Write in simplest form. 1 2
4 3
÷
5 10 3 1
Answer =- or -1 Simplify.
2 2
4 3 4 10 Multiply by the reciprocal
÷ =
10
3
5 10 5 3 of , .

10 3
Your Turn!
2
4 10 Divide by the GCF, 5.
= Find Multiplicative Inverse
1 5 3 4
Find the multiplicative inverse of 9
Answer 8 or 2 2 Simplify. A. 4 C. 9
9
9
3 3
B. 4 D. 9
4 4
Find each quotient. Write in simplest form.
Answer
5
÷ 3
6 Find the multiplicative inverse of 2 4
5 5 3 Write 3 as 3 7
÷ 3 = ÷ 1 7 18
6 6 1 A. C.
18 7
5 3 5 1 Multiply by the reciprocal 7 7
÷ = B. D. 2
3
1
6 1 6 3 of , . 7 4
1 3
Answer
5 Multiply.
=
18
Divide by a Fraction or Whole Number
5 3 5
Answer 18 Find 8 ÷ 6 . Write the product in simplest
form.

A. 18 C. 3
40 8
Divide by a Mixed Number 1
B. 9 D. 20
20
Example

3 1
-3
Find 4 ÷ ( ( Write the quotient in simplest
9 9
form.
3 1 14 28 Rename the mixed
4 ÷ ( ( = ÷-
-3
9 9 3 9 numbers as improper
fraction.
Answer

79