# Number Sense Blog

By Mathnasium | Added Dec 5, 2018

Do you play an instrument or a sport? How long to you spend practicing each week? Any skill is like a muscle, and should be exercised regularly—this goes for skills and activities such as playing instruments, reading, and even math!

In this week’s word problem challenge students can practice elementary school math skills such as addition and subtraction as they figure out how much time Amaryllis spends practicing the piano each week. Look below to exercise your math muscle by figuring it out for yourself. Don't peek! When you're ready, check below to compare your solution with ours.

Question: Amaryllis takes piano lessons every day. On weekdays, her lessons are 30 minutes long. On Saturdays and Sundays, her lessons are 45 minutes long. How many hours does Amaryllis spend at her piano lessons each week?

Solution: In a week, there are 5 weekdays. So, Amaryllis spends 30, 60, 90, 120, 150 minutes at her piano lessons on weekdays. On the weekend, she spends 45 + 45 = 90 minutes at her piano lessons. So, Amaryllis spends 150 + 90 = 240 minutes at her piano lessons each week. Since there are and 60 minutes in an hour, 240 minutes is the same as 4 hours.

### 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/

Before I came to Mathnasium, I could sum up everything I felt about math in one word: 'EVIL!' I hated math. ... Mathnasium has been my safe haven. They truly have shown me the light when it came to addressing my fear and provided me with the tools that I need to rebuild my prior knowledge so that I won't forget it. Math is no longer a subject I shy away from but it is a subject I can boldly accept and understand.