Maths 05: Numbers from Ten to Twenty

To help children understand number system further, we must remember that reading and writing from 10 to 20 is a major development for the child. Writing of numerals becomes rule governed beginning with ten.

Up to nine, children have to learn writing the numeral only by practice, there is no rule involved in writing 3, 5, or 8. Writing 10 or 17 or any number beyond ten involves a rule, or more accurately a set of rules. The number system base–10 (as we use it) is built on the idea of grouping at 10, and place of digit indicating the size of the group. This idea if fundamental to the arithmetic that the child is likely to do till upper primary. This chapter tries that the child makes a beginning in understanding important concepts of number system through a first hand experience of constructing numbers beyond ten. Therefore,