This bundle includes the lessons from Math 1 Unit 4 (Concept of the 4 Operations) and supporting material to accompany it:MATH 1 UNIT 4: The Concept of the 4 Operations:With the decimal system material we can demonstrate the function of the decimal system to the child but we have not yet given the mechanism of carrying out the four operations of: addition, multiplication, subtraction, and division. The operations are either static (meaning no exchanges), or dynamic (involving exchanges).The pres