Year 2 Addition Further worksheets on adding to make the next whole ten and finding pairs of numbers that make 20 have just been published in the Year 2 Addition category. It is important that children discover the most efficient strategy for mental addition and in both these cases counting on is the best to begin with, until children get to know off by heart the pairs of numbers that make ten. This knowledge makes these questions very easy. It is the move away from counting on to knowing, that constant practice will help to achieve. Go to Year 2 Addition