The numdrum is a number line extending from 0-139, which has been given a decimal structure by winding it round a tube in helical form in such a way that there are 10 numbers per turn.
Numdrum
£4.20
In stock
In stock
Description
The numdrum is a number line extending from 0-139, which has been given a decimal structure by winding it round a tube in helical form in such a way that there are 10 numbers per turn. This makes the number line continuous , unlike a 100 number square. The surface is dry-wipe and it is accompanied by a manoeuvreable plastic sleeve and an A4 sheet of suggested uses and puzzles to solve.
The dry wipe facility enables learners to mark numbers as in identifying numbers in any times table being practised.
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