Multiplying Whole Numbers, Part 2: Multiplication Facts For 6, 9, and 7
This clip explains that, now that we can multiply by 3, multiplying by 6 is easy because, "
it's just a matter of taking steps twice as big." It goes on to say that "
the 9's facts are in a class by themselves," explaining that, with the exception...
Multiplying Whole Numbers, Part 2: Memorizing the Multiplication Facts With Tables
This clip advises that, even with the full multiplication table filled in, the real work is just beginning, because it's necessary to commit the multiplication facts to memory. The clip then provides strategies for how to approach this task, suggest...
Multiplying Whole Numbers, Part 3: Multiplying a Larger Number by a Single-Digit Number
This clip presents a simple multiplication problem in which a three-digit number is multiplied by a one-digit number. The clip explains that multiplication is essentially a shortcut for what would otherwise be a very laborious addition problem, then...
Multiplying Whole Numbers, Part 2: Summary: Multiplying Whole Numbers, Part Two
This clip summarizes some of the key points about multiplication, touching on the concept of the number line, arrays, and the importance of looking at the units place of products. The clip also points out some of the interesting facts pertaining to ...
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.
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.
Multiplying Whole Numbers, Part 3: Review of Previous Multiplication Material
This clip reviews some of the key points from previous multiplication lessons, including expanded notation, the one hundred multiplication facts, and arrays.
Multiplying Whole Numbers, Part 1: Introduction to Multiplication: Factors and Products
This clip explains that multiplication is "a shortcut for addition." It also introduces the concept of factors, and states that the answer in a multiplication problem is known as the "product."
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.
Multiplying Whole Numbers, Part 2: Practical Multiplication Problems
This clip presents practical problems which the student can try to solve using the facts presented thus far in the "Multiplying Whole Numbers" lesson.