Terrific twenty

Using only the numbers 3 and 2 and the + and - signs, can all the numbers up to 20 be made?

Create my FREE account

including a 7 day free trial of everything

Email Address

Password

Newsletter

The URBrainy email newsletter (sent every 2 weeks) provides resource updates and helpful guides for teaching and learning.

Yes, I would like to receive the URBrainy newsletter.

I agree to the Terms and Conditions and Privacy Policy

Already have an account? Sign in

Roll two dice and add the totals. Record and sort the results. What do you notice?

A colourful set of number problems involving beads.

Colourful pages on solving number problems involving buttons.

Making 2-digit numbers.

The latest news, articles, and resources, sent to your inbox weekly.

URBrainy named one of the World’s Top EdTech Companies by TIME Magazine.