Number Sense Blog

Can your child answer these mental math questions? The results may surprise you! If they can solve problems at and above grade level, they may be ready for a challenge. If they are unable to answer questions at grade level or below, they're lik...

Grades 1 - 6: Charlie has 6 dimes and 3 nickels. Darlene has 2 quarters and 3 dimes. Who has more money and by how much? Grades 6 and up: A water jug is half full. After 6 cups of water are added, the jug is 70% full. How much water can the ent...

Mental Math: The Distributive Property Meets Wholes and Parts Whether you’re working on arithmetic or algebra, a strong understanding of the distributive property is a valuable tool to have in your mental math toolkit. Here’s our favorite way t...

Grades 1 – 6: Penelope baked a total of 144 cookies. She kept 40 for herself. She then took the remaining cookies and wrapped them in goody bags. If 4 cookies go in each goody bag, how many goody bags can Penelope make? Grades 6 and up: The pro...

Now that it's October, we have blustery weather, fall leaves, and Halloween on our minds. We're celebrating all month with a fun activity -- Trick or Treat! Solve these five math problems using mental math “tricks”, tell us how you solved them, an...