Young children can crudely add and subtract numbers before they have learned the rules of arithmetic, a new study finds. Researchers presented five- and six-year-old children with problems such as ...

Find out how to add and subtract fractions with matching and different denominators in this Year 6 article from BBC Bitesize.

Can you remember your times tables? Do you know how to add and subtract in your head? Try our quiz to see if you're as clever as a seven-year-old ...