Learn how to use column addition to add 3-digit and 2-digit numbers with this Year 4 Bitesize learning guide for KS2.

The two-digit number ab stands for 10a + b since the first digit represents tens and the second represents units. If 10a + b = 7 (a + b), then 10a + b = 7a + 7b, and so 3a = 6b, or more simply, a ...

Learn activities for fourth grade math to prepare for school. Teach your children 4th grade math skills like fractions, multiplication and division.