Category: Subtract Single Digits

Pick your favorite topic below. Read the opening, then solve the math together!

Tiny Turbo-Bird

The bee hummingbird is the world’s tiniest bird. Just how small is this little flying wonder? Read on to find out – and get buzzing

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Sneaky Circles

Quick, which orange circle is bigger? Believe it or not, they’re the same size! The blue circles play a trick on you called an optical

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