08:34
Multiplying Whole Numbers, Part 3: Splitting Arrays and Partial Products
This clip explains that the use of smaller arrays and the calculation of partial products provides the easiest way to multiply multi-digit numbers by multi-digit numbers not ending in zero.
00:44
Addition of Whole Numbers, Part 2: Summary: Addition of Whole Numbers, Part Two
This clip summarizes the process of finding the sum of two or more whole numbers and, in so doing, revisits the use of expanded notation.