This challenging book provides an entertaining approach to developing mental arithmetic. Spend just a few minutes each day tackling the carefully graded tests and, in no time at all, you'll be able to perform mental gymnastics quickly and accurately.
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EUR 5,73
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Paperback. Zustand: Very Good. The book has been read, but is in excellent condition. Pages are intact and not marred by notes or highlighting. The spine remains undamaged. Artikel-Nr. GOR001501228
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