Rounding Numbers to Nearest 10 and 100 | Car on a Hill Trick (Grades 3–5)

Looking for a fun and easy way to teach rounding numbers? Show your kids the "car on a hill" strategy!

Draw a hill with the tens or hundreds numbers on each side, draw a car at about the right place on the curvy mountain number line, and "let go with your giant hand and see which way it rolls!"

Kids love this visual, and it's such a fun way to make rounding "click" for kids.

Perfect for parents, teachers, and homeschoolers who want a hands-on math trick that helps kids in grades 3–5 round numbers with confidence:

--rounding numbers to the nearest 10
--rounding numbers to the nearest 100
--using number lines for rounding

Don't spend hours drilling rules for rounding; just draw a quick picture and watch for the lightbulb moment when rounding makes sense to your child.

(I taught this trick to a 4th grade boy who had stayed home from school with a stomachache because he was so upset that he couldn't round numbers. He learned it FIVE MINUTES and was actually laughing while doing his pages of math homework!)

👉 Watch next: How to Round BIG Numbers with the Car and Hill Trick
https://youtu.be/ZIKclNnrhEs?si=8Xx262KjW0HCkZNz