Ratios And Rates Worksheet - Chapter 3 Page 4
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38B.
Write another part-to-part ratio to describe the students.
part-to-part ratio
Write a part-to-part ratio to compare the number of tables
C.
a comparison of two
parts of the same whole
with boys to the number of tables with girls.
Write a part-to-whole ratio to compare the number of tables
D.
(e.g., 2 : 4 compares
with boys to all the tables. Write the ratio as a fraction.
the number of red tiles
Write a part-to-whole ratio to describe the number of tables
E.
to the number of
to ■”.
with girls to all the tables. Write the ratio in the form
“■
blue tiles)
Suppose three boys and one girl sat at one table.
F.
What would each of these ratios describe?
3
part-to-whole ratio
3 :1
1 to 4
•
•
•
4
a comparison of part of
G.
Suppose the ratio 2 : 2 represents the students at a table. Who
a whole to the whole
might be sitting at the table?
Draw five squares to represent the five tables.
H.
(e.g., 2 : 6 compares the
Arrange 10 red and 8 blue counters to represent the girls
•
number of red tiles to
and boys at the tables.
the total number of tiles)
that can be written as a
Sketch your model.
•
2
fraction, such as
List all the different ratios your diagram shows.
•
6
Explain how each ratio represents your seating arrangement.
•
What Do You Think?
Decide whether you agree or disagree with each statement.
Be ready to explain your decision.
The first term of a ratio should always be less than the second
1.
term.
The ratios 2 : 2 and 3 : 3 describe the same comparison.
2.
3.
If you know a part-to-part ratio, you can always calculate the
related part-to-whole ratio.
4.
Prices are like ratios since they compare two numbers.
105
Ratios and Rates
NEL
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