OK, this is WAY more toothpaste than you need to brush your teeth. But what’s the right amount? And as our fan Maggie H. asked, how many squeezes can you get from one tube? Dentists say to use a blob the size of a pea, which comes to about 1/100th of a fluid ounce. So for every ounce in the tube, we get 100 brushings. But there are other fun things to squirt. How many sundaes can a bottle of Hershey’s Chocolate Syrup cover? How many hot dogs from a bottle of ketchup? Let’s do the math to find out!
Wee ones: A pea can fit on the tip of your finger. Find 3 things in your room that can fit on your fingertip.
Little kids: If you squirt Hershey’s syrup on 5 bowls of ice cream and then eat them one by one, what numbers do you say to count down from 5? Bonus: If you have 7 bowls and squirt on every other bowl starting with the 1st, which number bowls do you skip?
Big kids: If you squirt a 6-inch line of ketchup on each hot dog, how many hot dog squirts do you need to reach your height? (Reminder: 1 foot has 12 inches.) Bonus: If each bottle of Hershey’s can squirt on 30 sundaes and each ketchup bottle can squirt on 40 hot dogs, which one can take care of more snacks, 5 Hershey bottles or 4 ketchup bottles?
Wee ones: Items might include a teeny Lego piece, a fluff of lint, or a crumb.
Little kids: 5, 4, 3, 2, 1. Bonus: The 2nd, 4th, and 6th.
Big kids: Different for everyone…figure out your height in feet and inches, and add up 2 hot dogs per foot, plus 1 more dog if you have 6 or more leftover inches. Bonus: The ketchup squirts more: you can cover 40 x 4 = 160 hot dogs, vs. 30 x 5 = 150 sundaes.
Laura Bilodeau Overdeck is founder and president of Bedtime Math Foundation. Her goal is to make math as playful for kids as it was for her when she was a child. Her mom had Laura baking before she could walk, and her dad had her using power tools at a very unsafe age, measuring lengths, widths and angles in the process. Armed with this early love of numbers, Laura went on to get a BA in astrophysics from Princeton University, and an MBA from the Wharton School of Business; she continues to star-gaze today. Laura’s other interests include her three lively children, chocolate, extreme vehicles, and Lego Mindstorms.