# Number Sense Blog

By Mathnasium | Added Jul 11, 2018

Money math skills are some of the most important, most often used math skills in everyday life. Even kids who may not do much purchasing on a regular basis will benefit from improving their money math skills. This week’s word problem challenge will help kids practice division, subtraction, percents and other elementary school math. Give it a try, practice a little every day, and your skills will soar!

Question: Dillon wants to buy a model airplane that costs \$34.00. She has a \$5.00 bill and a 75% off coupon. How much more money does Dillon need to get the model airplane?

When you're ready, check below for the solution.

Solution: Since the coupon is for 75% off, the model airplane costs 25% of its original cost, which is half of a half of \$34.00. Half of \$34.00 is \$17.00, and half of that is \$8.50. If Dillon has \$5.00, she needs \$8.50 – \$5.00 = \$3.50 more to buy the model airplane.

### Favorites

Bedtime Math: http://bedtimemath.org/

National PTA: http://www.pta.org/

NCTM: http://www.nctm.org/

Numberphile: http://www.numberphile.com/

PTO Today: http://www.ptotoday.com/

STEM Connector: http://blog.stemconnector.org/

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