Montessori Addition Ruler

Product introduction

·Product Name: Mathematical Decomposition Ruler

·Material: Wood

·Product size: 26.5 x 6.5 x 1.5 cm（10.4*2.55*0.59in）

·Conditions: brand new high quality, safe and non-toxic

·Packing method: original packaging

Features

·Clear numbers and accurate decomposition. The scientific track design is easy to pull and easy for children to use. Analyze addition and subtraction to make it easy for children to learn.