In the playground some children stood on coloured spots – 10, 20, 30, 60, 100, 120 etc We found that it was easy to add 6 or 8 or 9 to these tens numbers because they end in zero.

We know our place value – 37 = 30 and 7

Look closely at our chalk sums and you will see that we split the number we were adding on so that we could get to the ten then it’s easy to add what is left e.g.

27 + 7  (split 7 into 3 + 4)  27 + 3 = 30 + 4 = 34