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6) Another creation that costs nothing, using bottle caps to understand numbers and addition.

7) It’s simple: children attach pretty coloured clothes pegs with maths problems to the correct answers.

8) Counting to ten was never easier with these folding fingers!

9) Yet another simple way to perfectly master addition!

10) With a PVC tube, another easy way to add up your sweets or counters.

11) And we should never forget the old classics! Make an abacus from bottle caps and clothes hangers -what could be simpler?

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