LCM30減法板
LCM32-1 除法組 Division Working Charts
LCM32-1除算組
LCM32-2 除法紙 Division Tables
LCM32除算心算盒
LCM33-1 乘法組 Multiplication Working Charts
LCM33-1乘算組
LCM33-2 乘法紙 Multiplication Tables
LCM33乘算心算盒
LCM34乘法板
LCM35除法板
LCM36小數數架﹙串珠架﹚