Know other facts (3)

It's amazing how much you really know, if you just think about it!

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

All these numbers are multiples of 5. Just link into pairs to make each pair add up to 100.

Important concepts on the relationship between addition and subtraction.

Work out what else you know if you know one fact.

Finding pairs of numbers that add up to 50.

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