# Play with Calculator Riddles Activity

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Updated on Mar 20, 2014

The calculator that your child owns is a remarkable little machine. You've always known that it can perform mathematical calculations faster and with more accuracy than most humans, but did you know that it can also talk? Yes, it's true! Your child's calculator will spell things out if she pushes the right buttons. Figuring out the answers to these calculator riddles will take the mystery away from the machine, and familiarize your child with the many functions of the mighty calculator!

### What You Need:

• Calculator
• List of calculator riddles (below)
• The Calculator Alphabet (below)

### What You Do:

Use the calculator alphabet below to help find the answers to the following math riddles:

The Calculator Alphabet:

Upside-down numbers: 0 1 2 3 4 5 6 7 8 9

Letters: O I Z E h S g L B G

Calculator Riddles:

1. What is the only thing that gets larger the more you take away?

25,000 – 68 – 952 – 8,956 – 11,320 =

2. Picture these U.S. Coins: a nickel, a penny, and a dime. OK? Ellie's parents have 3 children. One is Nick and another is Penny. Who is the third?.05 ÷ .01 ÷ .10 × 3 × 211 + 123 =

3. Bill subtracted numbers for 20 minutes, Bess multiplied them, and Leslie added them.

• Who was more exhausted when they finished?
• 9 + 57 + 868 + 7920 + 93,208 + 215,475 =

• Who went into debt when they were finished?
• ​​17,865 – 9,438 – 607 – 95 – 7 =

• Who got the most work done in 20 minutes?
• .3 × 2 × 2.6 × 20 × 7.1 × 25
Adapted from "Mathamazing", the book of brainteasers, tricks, and riddles to make math fun for everyone. By Raymond Blum (New York, NY: Sterling Publishing Co., 2002). www.sterlingpublishing.com