HamiltonTrustPractice Worksheets: Subtract by counting up. ( Year 2 More Addition and Subtraction ) (0)
HamiltonTrustProblem-Solving Investigation: Subtract by counting up. ( Year 2 More Addition and Subtraction ) (0)
HamiltonTrustTeaching Presentation: Mental subtraction – counting up ( Year 3 Addition and Subtraction ) (0)