Letter To Family - Operations With Fractions
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1Chapter 4 4
What We’re Learning
Vocabulary
During the next few weeks, our math class
reciprocals Any two numbers
3
will be learning about operations with
whose product is 1. The numbers
and
4
4
3
4
fractions. We will add, subtract, multiply,
are reciprocals because
1.
3
4
3
and divide fractions.
invert To reverse the numerator and
3
Here are samples you can use as guides
the denominator of a fraction. Invert
8
8
to help your child.
to get its reciprocal
.
3
Guiding Your Child
Multiplying a Fraction by a Fraction
3
3
3
3
9
Step 1 Multiply the numerators to find the
4
7
numerator of the product.
Step 2 Multiply the denominators to find the
3
3
9
9
4
7
4
7
2
8
denominator of the product. Simplify the
product, if possible.
Dividing a Fraction by a Fraction
5
3
5
3
5
4
Step 1 To find
, rewrite as a
8
4
8
4
8
3
multiplication problem, using the
reciprocal of the divisor.
1
1
Step 2 Simplify by using prime factorization.
5
4
5
2
2
5
Cancel common factors. Then multiply.
8
3
2
2
2
3
6
1
1
During this chapter, students will need to continue practicing
basic addition, subtraction, multiplication, and division facts.
Sincerely,
Your child’s teacher
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