Using the triangles helps kids think in “fact families”. They learn that 1 + 2 = 3 and 3 – 2 = 1 at the same time. The triangles promote flexible thinking, which allows for faster problem-solving as kids practice.
- Craft foam in various shades
- Sharpie pen
How does it work?
Cut out equal-size triangles from different shades of craft foam.
Along with your child, use a sharpie pen to write an addition/subtraction or multiplication/division equation (depending on your child’s skills) on each triangle, placing one number in each corner; circle the answer.
Flip the triangles over. Choose one, cover the circled answer with your finger, and ask your child to solve it. (To practice the opposite operation, cover one of the other numbers.)