01:36
Multiplying Whole Numbers, Part 3: Multiplying by a Number With a Zero in the Middle
This clip explains that there's more than one way to multiply numbers with a zero in the middle. It suggests that for those just learning multiplication, there's less chance of error if one writes out the full row of zeroes in the partial product, r...
05:28
Multiplying Whole Numbers, Part 3: Multiplying by Ten, Twenty, Thirty and Beyond
This clip explains the role that zeroes play in multiplying numbers by 10, 20, 30 and so on.
01:56
Multiplying Whole Numbers, Part 3: Multiplying by Hundreds, Thousands and Ten Thousands
This clip explains that "
if we multiply a number by 100
we write two zeroes after that number," then goes on to explain the procedure of adding the correct number of additional zeroes when multiplying by a thousand or ten thousand.