Volume 8 Math Stars Worksheet Page 16
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35Vol. 8 No. 5
1.
The radius of a tennis ball is x
5.
In the figure below, finish numbering
centimeters. If a container holds three
the unshaded squares in the pattern as
balls, express its height in terms of x.
started:
2
3
2.
A box is to be built to hold 72 cubic
1
4
feet of tools. If the rectangular container
5
6
must be 36" wide and 48" long, what must
the height be to accommodate the tools?
6.
A class has 37 students. If I draw
3.
It is possible to write an expres-
names one at a time, how many names must
sion for every number from 1 to 100 using
I draw to be certain that
exactly 4 fours and any operations:
a) at least two of the names drawn have
[+, -, x, ÷, (),
, !]. For example:
the same birthday month?
1 = 4 ÷ 4 x 4 ÷ 4; 2 = 4 ÷ 4 + 4 ÷ 4.
Write an expression for eight using
b) at least three of the names drawn have
exactly 4 eights and any operations:
the same birthday month?
[+, -, x, ÷, (),
, !].
Strategy of the Month
Sometimes mathematical ideas are hard to think
about without something to look at or to move
around. Drawing a picture or using objects or
models helps your brain "see" the details,
organize the information, and carry out the
4.
Fill in the blanks with digits
action in the problem. Beans, pennies, tooth-
from {0,1,2,3,4,5} to make a true expres-
picks, pebbles, or cubes are good manipulatives
to help you model a problem. You can use
sion.
objects as you guess and check or look for
patterns. Try using objects to help you solve this
x 3
= 5
problem: Place the first six counting numbers
in the circles so that
the sum on each side
2
of the triangle is nine.
Is it possible to use
the numbers four
to nine to make the
sum of each side
the same?
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