Mental Subtraction

Several mornings a week we play ‘target’. This involves mentally calculating a mathematical story to reach a specific number. We can add, subtract or use a mixture of both – as long as we can prove it works! One of our target numbers this week was 25 and we explained how to reach this number using a variety of strategies including counting on and back, using our knowledge of tens and units, doubling and adding on and counting in 5s and 10s. Miss Cauley was very impressed!