Restar Y Quitar / Subtracting And Taking Away (Las Matematicas Basicas / Basic Math)Richard Leffingwell
Compartir Y Dividir/ Sharing And Dividing (Heinemann Lee Y Aprende/Heinemann Read and Learn (Spanish))Richard Leffingwell
Sumar Y Contar Hacia Adelante / Adding And Counting on (Las Matematicas Basicas / Basic Math)Richard Leffingwell
Sumar Y Contar Hacia Adelante/ Adding And Counting on (Heinemann Lee Y Aprende/Heinemann Read and Learn (Spanish))Richard Leffingwell
Duplicar Y Multiplicar / Doubling And Multiplying (Las Matematicas Basicas /Basic Math)Richard Leffingwell
