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070_G5U13_G6U15_TG 2014.4.18 3:34 PM ˘ ` 192

Activity 2 Dividing Fractions by Whole Numbers

jOb ective Divide fractions by whole numbers using different methods.

1. Textbook Instructions Activity 2 Dividing Fractions by Whole Numbers

Learn how to divide a fraction by a whole number.

Solve the example for students using the

model. Divide. 2 3
3
Example: 2 3
3 Divide the square into Divide the square into Write a multiplication
sentence to find the
Divide a square into three equal parts and three equal parts. three equal parts in the parts that are colored
with both colors.
color 2 . Color 2 of the square. other direction.
3 3
Color 1 of the square
3
Divide the square again into three parts and
with a different color.
1
color in 3 with a different color.

Make a multiplication sentence. 2
3

2 3 2 1 2
3 3 3 9

2 3 is equal to one out of three parts of 2 . 1
3 3 3

1. Have students use the model coloring _ı = _\_1
method to divide fractions.
2 3 2 12
The parts that are colored with both colors 3 3 39
represent the quotient. Using the model,
students can make a multiplication sentence 1 . Divide a fraction by a whole number using models.
and find the product.
a. b.

1 6 1 1 1 3 5 3 1 3
3 3 6 18 4 4 5 20

118

2. Build Understanding

Some students may have difficulty with the model method due to its visualization technique.
When the square is divided in two different directions, each direction represents a different fraction.
The columns of the square represent one fraction, and the rows represent another.
Try using a piece of scratch paper to keep track of the number of vertical and horizontal divisions made.

192 NUMINO Teacher s Guide