Volume 8 Math Stars Worksheet Page 30
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35Vol. 8 No. 9
3.
Complete the table below, then
1.
A playground director is planning
write a rule that defines the value of y in
to buy a trampoline. She can choose a
terms of x .
rectangular or circular model. The
perimeter of the rectangular trampoline is
x
1
3
5
7
9
10
50 feet and the circumference of the
y
2 10 26 50
circular model is also about 50 feet. She
wants to buy the trampoline with the
greater area so the children will have
4.
Doug is digging a ditch from his
plenty of room to jump and turn. Which
house to the road. If he digs from A to B
model should she buy?
the first day, from B to C the second day,
and from C to the end on the third day,
about what percent of the task will be com-
pleted at the end of the first day?
2.
A group of 53 scouts is planning
a camping trip. They can rent 2-person,
3-person, or 4-person tents. Rental costs
A
B
C
are equal but they want to take the fewest
number possible. If no one wants to sleep
in a tent alone, how many of each type
Strategy of the Month
should they rent?
What if you know the result of a situation, but
you don't know the beginning? For example,
you might know that you end up with thirteen
baseball cards after doing a certain number of
trades and you want to figure out how many
cards you had before the trading started. In that
case you need to work backwards; you have to
think about your actions in reverse order. This
strategy works for any sequence of actions
when you know the end result rather than the
starting place. Try working backwards to find
the starting number on this flow chart:
??
- 1
7
÷ 2
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