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Playlist: 4th grade math

How Many Ways: Add to 50

Fill in the blanks so two numbers add to exactly 50, using each digit only once. Then find the sneaky ways that start with a zero.

Place Value (Beyond Base 10)

Place value is something we cover in elementary school. It seems simple, but I’d wager that very few adults really understand the topic. I sure didn’t until I worked with non-base-10 number systems in college. Your students can get a taste of this mind-boggling experience by imagining what it would be like if we didn’t have the number 9. What would each digit represent then?

Greek and Latin Dinosaur Names

Let’s create a new dinosaur using Greek and Latin stems!