Learn how to use column addition to add 3-digit and 2-digit numbers with this Year 4 Bitesize learning guide for KS2. ... Let's look at how to solve the sum 237 + 25. First, let's look at 237.

Two Chinese school pupils made waves on national television with their mental arithmetic skills, adding up 100 three-digit numbers within 45 seconds. Victorious schoolmates Wu Yaqi and Pan Yuying ...