MATH DEVELOPMENT ALBUM
4.5 THE FUNCTION OF THE DECIMAL SYSTEM
(FORMATION OF COMPLEX NUMBERS)
MATERIAL:
The nine tray
PRESENTATION:
1. Lay out the materials as described for the Introduction to the Nine tray.
2. The Directress asks for a simple quantity such as 600.
3. The amount is placed on a tray. The child is then asked to obtain the symbol to match.
4. The first time this is done the quantities should be selected from the same columns until the child
or children are familiar with the quantities.
5. Reverse the process and select symbols and have the child or children bring the quantity.
CONTROL OF ERROR:
1. Seeing materials out of place.
2. Matching the wrong symbol to the wrong quantity.
PURPOSE OF THE MATERIAL:
1. Auditory and visual association of the composition of numbers.
AGE:
4 plus to 5 years
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