Shipped directly from China. Standard shipments typically take 20-70 days to arrive after payment（according to different country） If you have any questions, please contact our customer service staff. service_china@adenamontessori.com
This 2-compartment box with lid contains plastic chips,1 set with equations printed on them and 1 set with the answers to be used with the Subtraction Working Charts.
All the equations and differences for the subtraction combinations 1–18 are included.
