Topic: Rational Numbers
Page 11
Level: Apply
L 2.4 p.66
Do: Multiply and Divide Rational Numbers using rules of integers.
Essential Question: How is division of rational numbers as fractions
related to multiplication of rational numbers as fractions?
Questions:
To multiply rational numbers (fractions):
First, write all mixed and whole numbers as
__________ __________.
Second, multiply across the _____ (numerator
times numerator) and across the _________
(denominator times denominator).
Third, ____________ the answer in lowest terms.
 You can simplify before you multiply in many
cases.
A) Multiply Rational Numbers (Fractions)
1
2
Questions:
3
To multiply rational numbers (decimals):
First, ____________ the numbers.
Second, the answer has the __________ of
decimal _________ values equal to the total
______ of number of decimal places in the
factors.
Remember, operations with decimals follow
___________ ________.
4
Questions:
To divide rational numbers (fractions):
First, write all mixed and whole numbers as
__________ __________.
Second, _________ division to multiplication by
the _______________ of the divisor. Reciprocal
means _______ the fraction.
Third, multiply across the _____ (numerator
times numerator) and across the _________
(denominator times denominator).
Third, ____________ the answer in lowest terms.
 You can simplify before you multiply in many
cases.
5
6
.
.
Questions:
Remember when dividing rational numbers
(decimals), the divisor needs to be a _________
number. First, ________ the decimal the number
of place values required to make a whole number
divisor. Second, move the decimal the ________
number of place values in the dividend. Use
________ to hold place value if needed.
7
.
D) Multiply More Than Two Rational Numbers
Summary: