Subtract within 20

King of the Garbage Can
December 1st, 2022

You probably know that it isn’t a great idea to eat out of the garbage. But that’s where some of the favorite foods of raccoons come from. Read on to do the math behind these super smart, masked masterminds!

Chickens Playing the Xylophone
November 30th, 2022

The xylophone is such a fun musical instrument. So why should we humans be the only ones to enjoy playing it? Read on to do the musical math in chickens pecking and playing this fun instrument!

Do Flying Fish Really Fly?
November 14th, 2022

Flying fish got that name for a reason. But do they really fly? Read on to do the math to find out!

Stuck Truck
November 12th, 2022

Next time you drive under a bridge or overpass, look for a sign on the side with numbers on it. It will tell you the bridge’s height above the road in inches and feet. Why? So we don’t have what happened in this picture!

Don’t Blink!
November 8th, 2022

Bedtime Math fan Sydney B. asked us, how long was the world’s longest staring contest? Read on to find out – but don’t blink…you might miss the math in this eye-opening world record!

New York by the Numbers
November 3rd, 2022

New York is a big city. And when you stop to think about all the wild numbers around it, it seems even bigger! Read on to see how the math adds up in the City That Never Sleeps.

It’s Inktober!
October 1st, 2022

Our longtime fan Ajax L. just told us that October is also Inktober, where the challenge is to draw an ink drawing every day this month. Read on to see how quickly the artwork – or inkwork! – adds up.

Pearls Are for the Birds
September 7th, 2022

What’s on the menu tonight for this bird? Oysters, maybe with a side of pearls. Read on to find out more about the oystercatcher, and do the pearly math!

The Tree You Can’t Hug
August 25th, 2022

If you’ve ever hugged a tree all the way around, we bet it was not a sequoia. Sequoias are huge trees! So naturally there’s a lot of math in them. Read on to discover the numbers in these towering trees.

Dashing Down the Street
August 19th, 2022

You know those white and yellow lines painted down the middle of the roads? How long do you think they are? Read on to find out the answer – and be shocked by the “street math!”

Top