Addition and subtraction are two of the ways we work with numbers. We call them arithmetical operations. The word operation comes from the Latin ‘operari’, meaning to work.
It is very essential for the learners to develop mental strategies along with formal learning. Learners of CAIE 3 went exploring the various tools to learn the various methods of addition and subtraction. They solved problems which led them to the clue for the next level. The learners were very excited to solve the activity quickly which led them to use the mental strategies.