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Have you heard of FOIL - not the aluminum kind, but the one that can help you multiply faster? Keep on reading The Math Dude to learn more!

By
Jason Marshall, PhD
Episode #229

## Solution: Challenge Problem

If we split 74 into 70 + 4 and 45 into 40 + 5, the problem 74 • 45 becomes 74 • 45 = (70 + 4) • (40 + 5).

Using FOIL, we get 74 • 45 = (70 • 40) + (70 • 5) + (4 • 40) + (4 • 5.) These are all fairly easy to solve in your head, which means you can quickly calculate

74 • 45 = 2800 + 350 + 160 + 20 = 3330. Done!

## Wrap Up

Okay, that’s all the math we have time for today.

For more fun with math, please check out my book, The Math Dude’s Quick and Dirty Guide to Algebra. And remember to become a fan of The Math Dude on Facebook, where you’ll find lots of great math posted throughout the week. If you’re on Twitter, please follow me there, too.

Until next time, this is Jason Marshall with The Math Dude’s Quick and Dirty Tips to Make Math Easier. Thanks for reading, math fans!

Aluminum foil image courtesy of Shutterstock.