Word Problems
Using
Fractions and Decimals
By: Chris Spivey
Definitions
• Word Problem- Using your understanding and
knowledge of mathematical concepts and
principles to find solutions in new unfamiliar
situations.
• Decimals- A number containing a decimal point
like 0.07 and 1.35 are decimals.
• Fractions- A number that compares part of an
object or a set with the whole. Example, The
fraction ¾ means 3 parts out of a total of 4 equal
parts.
Word Problem with Fractions
• Example: 2/3 of the 15 cars left the
parking lot.
• An 8-3/4 foot board must be shortened to
6-1/3 feet. How much must be removed?
Solved With Fractions
• Answer: 10.
Solution: 1/3 of 15 is 5. 2/3 of 15 is 2 x 5 =
10. The number of cars that left the
parking lot is 10.
• Solution:
removed = current length - new length
2 5/12 = 8 3/4 feet – 6 1/3 feet
Word Problem
with
Decimals
To make a miniature ice cream truck, you need
tires with a diameter between 1.465 cm and
1.472 cm. Will a tire that is 1.4691 cm in
diameter work? Explain why or why not.
Solved With Decimals
No
w
let'
s
ord
er
the
se
dec
ima
ls
fro
m
lea
st
to
gre
ate
st.
Let's start by writing one decimal beneath the other in their
original order.
1.4650
1
.
4
6
5
0
1.4720
1.4691
Now let's order these decimals
from least to greatest.
1 . 4 7 2 0
1.4650
1.4691
1.4720
Answer :A tire that is 1.4691 cm in diameter will
work since 1.4691 is between 1.465 and 1.472.
1
.
4
6
9
1
Resources
•
•
http://www.businessbookmall.com/Unit%2040.pdfhttp:
//www.lemieuxperformanceracing.ca/Portals/0/Rotator/Muscle%20cars.jpg
•
http://images.google.com/imgres?imgurl=http://www.countryneedle.net/imag
es/large/tcn_involveme.jpg&imgrefurl=http://www.countryneedle.net/index.p
hp%3Fmain_page%3Dindex%26cPath%3D20&usg=__oV85KoQOREC4ww
gRlF6nULdSBRc=&h=261&w=373&sz=46&hl=en&start=92&um=1&itbs=1&t
bnid=3uMU8k2hTZbLJM:&tbnh=85&tbnw=122&prev=/images%3Fq%3Dma
th%2Bsymbols%2Bon%2Bchalkboard%26start%3D80%26um%3D1%26hl
%3Den%26safe%3Dactive%26sa%3DN%26rls%3Dcom.microsoft:en-us:IESearchBox%26rlz%3D1I7WZPA_en%26ndsp%3D20%26tbs%3Disch:1
•
http://elgallodecb.zonalibre.org/American-muscle-cars-739348.jpg
•
http://www.mathgoodies.com/lessons/decimals/solve_word_problems.html