© 1999 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI-34
Û
: A Guide for Teachers
33
Sewing Costumes—Fractions
(Continued)
Procedure
1.
Using the TI-34
Ö
, find the total yardage needed
for the 14 costumes by multiplying the amount of
material needed for the costume by the number
of costumes needed.
33
2
/
8
yards
2.
Next, simplify the result.
The total yardage needed is 33 ¼ yards, but you
only have 23 yards. You don’t have enough.
3.
Find out how much more you need by
subtracting the yardage you have from the
yardage you need.
10
1
/
4
yards
4.
Compute how much it will cost to buy the
additional material by multiplying the additional
amount by $3.98.
$40.80
5.
Find out how many costumes you could make
with the material you have. After the students
make the calculations, ask them what the answer
means. Can they make nine or ten costumes?
9
6.
Find out if you would have enough material for
all 14 costumes if each costume only required 1
2
/
3
yards by multiplying the two numbers.
You still don’t have enough.
Extension
Have the students determine how much material it
would take to make a shirt for everyone in the class.
³
Be sure your calculator is in
mixed number mode before
you begin.
³
1. Press 2
@
3
>
8
V
14
<
.
2
Ë
Ë
3
Ì
Ì
8
¿
¿
14
33
Ë
Ë
2
Ì
Ì
8
2. To simplify, press
}
<
.
Ans
4
Simp
33
Ë
Ë
1
Ì
Ì
4
