Name: Date: © HarperCollinsPublishers Ltd. 2014 Children look at each set of addition and subtraction calculations and continue the pattern on each of the magic carpets, writing the correct numbers into the spaces. Teacher’s notes Recognise patterns in addition and subtraction facts Magic carpet calculations Year 1, Unit 11, Week 1, Lesson 2 Extension 19 + 0 = 19 − 0 = 20 − 4 = 20 + 0 = 18 + = 19 19 − 1 = 20 − 5 = 19 + = 20 17 + = 19 − 2 = 17 − 6 = 18 + = 20 + = 19 − = − = + = 20