Relate addition and subtraction (1)

In these questions, you are told one fact about a sum. Write down three others without doing any more calculating.

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

Time for something different: true or false?

Adding and subtracting numbers that cross the thousands boundary: often ?counting on? is the best method.

Add twenty and take one is much quicker than trying to add nineteen. But not always!

Given one fact helps with working out similar facts.

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