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068_G5U09_G6U13_TG 2014.4.18 2:38 PM ˘ ` 132
Activity 2 Multiplication of Fractions
jOb ective Multiply unit fractions.
1. Textbook Instructions Activity 2 Multiplication of Fractions
In this exercise, students will learn how to A unit fraction is a fraction that has 1 as the numerator and a positive
multiply unit fractions using models. number as the denominator.
Learn how to multiply unit fractions. Have students learn how to multiply unit fractions using models.
Example: 1 1 Multiply. 1 1
53 5 3
First, have students divide the rectangle into Divide the rectangle Divide the rectangle Count the total number
into 5 equal parts in of parts. Then count the
three equal parts. into 3 equal parts. number of parts shaded
with both colors.
Then, have them color 1 of it. Next, have Color 1 of the parts. the other direction.
3 3
Color 1 of the parts.
them divide the rectangle again, this time 5
into five equal parts. Lastly, have them color
1 of the parts. A section of the row will
5
overlap a section of the column, indicating
that 1 is the answer. 1 11 number of parts shaded with both colors
15
5 3 15 total number of parts
111 1 . Multiply unit fractions using the method above.
5 3 15 Have students draw lines to divide the rectangles and solve the multiplication problems.
a. b. c.
1. Have students draw lines to divide the 11 1 11 1 11 1
rectangles and solve the multiplication 22 4 24 8 34 12
problems.
82
2. Build Understanding
A mixed number is a whole number combined with a fraction; for example, 6 3 . To multiply a mixed number,
4
first convert it to an improper fraction by multiplying the whole number by the denominator and then adding it
to the numerator. 6 3 becomes 27 . Students can then solve a multiplication problem normally.
4 4
Example: 6 3 11
4 2 15
6 3 1 27 1 27 3 3
4 2 4 2 8 8
132 NUMINO Teacher s Guide
Activity 2 Multiplication of Fractions
jOb ective Multiply unit fractions.
1. Textbook Instructions Activity 2 Multiplication of Fractions
In this exercise, students will learn how to A unit fraction is a fraction that has 1 as the numerator and a positive
multiply unit fractions using models. number as the denominator.
Learn how to multiply unit fractions. Have students learn how to multiply unit fractions using models.
Example: 1 1 Multiply. 1 1
53 5 3
First, have students divide the rectangle into Divide the rectangle Divide the rectangle Count the total number
into 5 equal parts in of parts. Then count the
three equal parts. into 3 equal parts. number of parts shaded
with both colors.
Then, have them color 1 of it. Next, have Color 1 of the parts. the other direction.
3 3
Color 1 of the parts.
them divide the rectangle again, this time 5
into five equal parts. Lastly, have them color
1 of the parts. A section of the row will
5
overlap a section of the column, indicating
that 1 is the answer. 1 11 number of parts shaded with both colors
15
5 3 15 total number of parts
111 1 . Multiply unit fractions using the method above.
5 3 15 Have students draw lines to divide the rectangles and solve the multiplication problems.
a. b. c.
1. Have students draw lines to divide the 11 1 11 1 11 1
rectangles and solve the multiplication 22 4 24 8 34 12
problems.
82
2. Build Understanding
A mixed number is a whole number combined with a fraction; for example, 6 3 . To multiply a mixed number,
4
first convert it to an improper fraction by multiplying the whole number by the denominator and then adding it
to the numerator. 6 3 becomes 27 . Students can then solve a multiplication problem normally.
4 4
Example: 6 3 11
4 2 15
6 3 1 27 1 27 3 3
4 2 4 2 8 8
132 NUMINO Teacher s Guide
