Sherlock Bones The Addition Subtraction Adventure — Kolektif

Sherlock Bones and Dr Catson are entangled in an arithmetic adventure They must follow a teasing trail of addition and subtraction themed maths puzzles and it s up to the reader to solve each sum all in the hope of foiling Professor Moriratty s evil plan This charming maths activity book features Sherlock s Secret Solver magnifying glass which reveals the answer to each puzzle when placed over a moiré area allowing children to test their numeracy skills again and again