03:30Maths ChallengeMaths Challenge 1Complementary additionSchool Radio Duration: 15 minutes Fri 24th Oct 2014, 03:30 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 Complementary addition.GenresLearningPrimaryBrandMaths ChallengeSeriesMaths Challenge: Maths Challenge 1 Source: BBC Online
