Arithmetic Measurement System quantifies arithmetic operations just by measurement and without arithmetic calculation or even counting. Playing cards may be annotated with size-coded marks or card tags to represent face value. For example, a tag representing a face value 5 is half the size of one representing a value 10 using a linear tag scale, or about 7/10.sup.th the size using a log.sub.10 tag scale. Users align linear tags in a contiguous row to add values or overlap tags to subtract values. Users align logarithmic tags in a row to multiply values or overlap tags to divide values. Integrated and separate measures with corresponding linear or logarithmic tag-scales quantify a total value of aggregate or net tag row size. Product developers may use the Arithmetic Measurement System of tags and measures to provide novel educational math manipulatives and playing card games for players unskilled in arithmetic.