Have you ever had an event or a date that you need to remember, but you just can’t seem to know what day of the week it was? Hmmm, was that a Monday or a Tuesday? And of course, it ends up being a Friday!
Or maybe you have traveled outside of the U.S. and the temperature is in Celsius. Oh man, I don’t know how to put that into Fahrenheit.
Well, you’re in luck! These Math Hacks are great tricks to give you the solutions to those problems.
For instance, If we decide that today is March 18th, and we recall that the months of April, June, September, and November each have 30 days, while the other 5 months between now and next January each have 31 days. This will mean that there will only be 13 days left in March, 4 x 30 = 120 days left for all the months that have 30 days between now and next January, 5 x 31 = 155 days left for all the months that have 31 days between now and next January, and then 1 more day to get from December 31 to January 1. Finally, this will give a grand total of 13 + 120 + 155 + 1 = 289 days until the following January 1st.
Once you have figured out the number of days until the date you’re interested in, then you’ll be all set because we’ve already learned how to finish the rest of the equation from that point. Now, 289 divided by 7 days a week is 41 remainder 2.The date that we are calculating is Friday, March 18, we’ve found that next New Year’s Day must be 2 days after a Friday…which is a Sunday!
Ok, now for a more simple math life hack. Suppose you visit England and you want to set the temperature in your hotel room to something comfortable. Instead of doing a guess-and-check method, there is an easy way to make a quick estimate. So let’s try Celsius to Fahrenheit: Multiply the temperature by 2 and then add 30. Fahrenheit to Celsius? Just do the opposite. While the exact formula is more complicated, this quick estimate is so easy and will put you closer than you can tell.
Well friends, that’s it for today’s math life hack edition. If this math made your head spin, or if you’d like to learn more cool tricks come on down to Mathnasium of Avon, the Math Club. At Mathnasium of Avon, we strengthen mental math, build number sense, and help children develop all sorts of terrific Math Hacks.