Multiplication

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# Multiplication - PowerPoint PPT Presentation

Multiplication. Vocabulary Review. Factors &amp; Products. 4 x 6 = 24 4 and 6 are factors – the numbers being multiplied together. 24 is the product – the answer to a multiplication problem. Estimate. Estimate – to make a good guess by rounding . In the problem 73 x 6, round 73 to

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## PowerPoint Slideshow about ' Multiplication' - lyndon

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### Multiplication

Vocabulary Review

Factors & Products
• 4 x 6 = 24
• 4 and 6 are factors – the numbers being multiplied together.
• 24 is the product – the answer to a multiplication problem.
Estimate
• Estimate – to make a good guess by rounding.
• In the problem 73 x 6, round 73 to

70 and DO NOT round the single digit number of 6!

• This would give you a new problem of

70 x 6.

• You can then use the basic math fact of 7 x 6 = 42 to help you get the product.
• Simply count the number of zeros in the factors and add them to the end of the basic math fact answer. The product is 420!
Multiple
• A multiple is the product of any two whole numbers.
• For example: 3, 6, 9, 12, and 15 are multiples of 3.
• 3x1=3
• 3x2=6
• 3x3=9
• 3x4=12
• 3x5=15
Properties of Multiplication
• Zero Property of Multiplication – the product (answer) of any number times 0

is 0! 4x0=0 or 9x0=0

• Identity Property of Multiplication – the product (answer) of any number times 1 is that number! 4x1=4 or 8x1=8
• Commutative Property of Multiplication – two numbers can be multiplied in any order and the product (answer) is the same. 4x2=8 and 2x4=8.
Properties of Multiplication
• Associative Property of Multiplication –

(3x2)x4 = 3x(4x2)

• You can change the grouping of the numbers you multiply! You will still get the same product (answer).