In the last post on Mental Arithmetic I explored the mental arithmetic for adding numbers up to 2-digit number. I now extend this to the topic of “number bonds” – which are various ways in which we can divide up a number into its parts and combine these parts back into the number.

This is a very important part of early mathematics development of learners, and it is essential that this part of mathematics is learned so that is becomes a habit which is imprinted into the mind of the learner, rather than requiring the learner to use a procedure for counting, since such procedures will slow down the learner.