03:15Maths ChallengeMaths Challenge 1Addition and subtraction of the number 9School Radio Duration: 15 minutes Thu 17th May 2012, 03:15 on School RadioAvailable for over a yearListen nowRalph van Dijk and side-kick Matrix have more questions to consolidate mental maths skills and the focus today is adding and subtracting the number 9.GenresLearningPrimaryBrandMaths ChallengeSeriesMaths Challenge: Maths Challenge 1 Source: BBC Online
