Dimensions: Each bone measures 60mm x 210mm.

Maths Crunchers: A highly motivational, fun and simple product to use. These bone shaped crunchers are printed black on yellow for optimum visual clarity. Slide the question mark over to conceal part of a sum, symbol or sequence etc. Each cruncher in the pack is different! A product that can be used time and time again!

Number Crunchers to 20; Hold up the bone saying 1 + 15 = ? OR 1 + ? = 16 This simple to use and yet incredibly versatile set includes 100 large plastic bones with sliders to conceal any part of the addition and subtraction sums to 20. This set does not include number bonds to 10.