1 two numbers whose sum is 10 2 two numbers whose sum is 0.6 Mental methods N3.1 Support Starter Use the grid to find 1 two numbers whose sum is 10 2 two numbers whose sum is 0.6 3 the smallest number 4 two numbers with the same value 5 another way of writing 1 divided by 4 6 two numbers with a difference of 0.9 7 the result of the product of two equal numbers 8 two numbers whose sum is 2 9 three numbers whose sum is 6.6 10 three numbers whose sum is 46 Preamble A wipe-board activity, where speed ensures that pupils are using recall and mental methods. It allows instant assessment and remediation. The choice of questions can, of course, be extended. Possible content Recall of number facts and mental methods of calculation. Resources Wipe boards. Solution/Notes 1 4 + 6 2 0.1 + 0.5 or 0.1 + ½ 3 0.1 4 ½ and 0.5 5 ¼ 6 1.5 and 2.4 7 4 (2  2), 25 (5  5) or 36 (6  6) 8 0.5 + 1.5 or ½ + 1.5 9 6 + 0.5 + 0.1 or 6 + ½ + 0.1 or 0.5 + 2.1 + 4 or ½ + 2.1 + 4 10 6 + 15 + 25 or 4 + 6 + 36