Skip to content

Adding two 3-digit numbers mentally. Often it is best to start with the hundreds, then the tens and finally the units; this is the opposite order than when using written methods.

Preview of ' More mental addition'

Create my FREE account

including a 7 day free trial of everything

Already have an account? Sign in

Free Accounts Include

  • View / Print monthly free resources forever
  • View everything for 7 days
  • Choose any 5 resources to download

Subscribe to our newsletter

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

© Copyright 2011 - 2024 Route One Network Ltd. - 5.1