Abstract

In contrast to an existing tendency, the teaching procedures related to the block of numbers 1--20 are considered with nicety of detail. Interdependence of addition and subtraction is treated with a differentiation of syntactic matters from those semantic. A comparison of matching and counting is also included in order to show why matching alone would not lead to the building of the system of natural numbers.

Keywords: Block of numbers 1--20, interdependence of addition and subtraction, matching and counting.

Pages:  41$-$51     

Volume  III ,  Issue  1 ,  2000