Word ProblemsUsing

Fractions and DecimalsBy: 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 Problemwith

DecimalsTo 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

Let's start by writing one decimal beneath the other in their original order. 1.4650

1.4720 1.4691 Now let's order these decimals from least to greatest.

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 5 0

1 . 4 7 2 0

1 . 4 6 9 1             

Now let's order these decimals from least to greatest.

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/images/large/tcn_involveme.jpg&imgrefurl=http://www.countryneedle.net/index.php%3Fmain_page%3Dindex%26cPath%3D20&usg=__oV85KoQOREC4wwgRlF6nULdSBRc=&h=261&w=373&sz=46&hl=en&start=92&um=1&itbs=1&tbnid=3uMU8k2hTZbLJM:&tbnh=85&tbnw=122&prev=/images%3Fq%3Dmath%2Bsymbols%2Bon%2Bchalkboard%26start%3D80%26um%3D1%26hl%3Den%26safe%3Dactive%26sa%3DN%26rls%3Dcom.microsoft:en-us:IE-SearchBox%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