2+2 - 4, 7+9 - 16, 1+8 - 9, 7+4 - 11, 8+7 - 15, 9+4 - 13, 1+3 - 4, 2+3 - 5, 7+8 - 15, 4+7 - 11, 8-4 - 4, 15-9 - 6, 8-3 - 5, 13-8 - 5, 13-7 - 6, 15-9 - 6, 14-6 - 8, 4-2 - 2, 13-4 - 9, 14-7 - 7, 14+24 - 38, 21+13 - 34, 21+17 - 38, 42-24 - 18, 32-12 - 20, 37-17 - 20,

Maths Addition and subtraction quick recall

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