Ratios And Rates Worksheet - Chapter 3 Page 26
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38Reflecting
Communication
Checklist
Which parts of the Communication Checklist did Nikita cover
C.
well? Which parts did Misa cover in her questions?
✔
Did you explain how
you performed your
D.
How else could you change Nikita’s explanation to make it
calculations?
better?
✔
Did you explain why you
did each calculation?
✔
Did you use a model, a
chart, or a diagram to
make your thinking clear?
✔
Did you check that your
answer makes sense?
WORK WITH
the Math
Example 1
Communicating about ratios
The Coyotes have won 8 of their first 20 soccer games. If this
continues, how many games would you expect them to win
out of 30 games? Explain your thinking.
Preston’s Solution
I realized this was a ratio problem and I
assumed that the team’s winning ratio would
stay the same.
■
I set up a proportion in which the first value
8 : 20 =
: 30
was wins and the second was total games.
I like ratio tables, so I used one to solve the
problem.
It was hard to figure out what to multiply 20 by
Wins
8
4
12
to get 30, so I divided 8 and 20 by 2 to get 4
Games
20
10
30
and 10 and then I multiplied both terms by 3.
÷ 2
x 3
This answer is reasonable, since if they
In 30 games, they would probably win 12.
played 40 games, they would win 16, and
12 is between 8 and 16.
127
Ratios and Rates
NEL
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