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The Cuisenaire Gattegno Method Of Teaching Mathematics

100,000,005 — 100,000,000 would easily give us 5 as the answer. More ‘complicated’ examples can be tried in which in the beginning one step transformations are made starting from the right; for example:

1

8 is added to each number (10,839 – 8,460);

2 40 is added to each number (10,879 – 8,500); 3 500 is subtracted from each number (10,379 – 8,000); 4 The difference, 2,379 can easily be written down. Similarly with 207,101 – 65,784, step by step transformations are again made but this time each number that is to be added will be noted down in turn:

The number in brackets is the complement of 65,784 in 100,000:

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The Cuisenaire Gattegno method of teaching Mathematics  
The Cuisenaire Gattegno method of teaching Mathematics  

The Cuisenaire Gattegno method of teaching Mathematics

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