Multiplication Patterns

• The Big Question !!!

How can you use a basic fact and a pattern to multiply by a 2 digit number??

Multiplication Patterns

• How close have you been to a bumblebee??

• The actual length of a queen bumblebee is about 20 millimeters. The Photograph shows a part of a bee under a microscope, at 10 times it actual size. What would the length of the bee appear to be at a magnification of 300 times its actual size??

Multiplication Patterns

• Use a basic fact and a pattern.• Multiply 300 X 20• (Basic fact 3 X 2 = 6)• 30 X 2 = (3 X 2) X 10 first = 60

• 300 X 2 = (3 X 2) X 10 second =_______

• 300 X 20 = (3 X 2) X (100 X 10) = 6 X 10 third = __

Multiplication Patterns

• So the length of the bee would appear to be about _______ millimeters.

• What pattern do you see in the number sentences and the exponents?

• What would be the length of the bee shown in the photograph appear to be if the microscope shows it at 10 times it actual size?

Multiplication Patterns

• Use mental math and patterns .• Multiply 50 X 8000• (basic fact 5 X 8)• 5 X 80 = (5 x 8) X 10’ = 400• 5 X 800 =• 50 X 800 = (5 X 8) X (10 X 100) = • 50 X 8000 = (5 X 8) X 10 X 1000) =

Multiplication Patterns

• Use mental math and a pattern to find the product.

• 30 X 4,000 = _________________

• What basic fact can you use to help you find 30 X 4,000?

Multiplication Patterns

• Use mental math to complete the pattern.

• 1 X 1 = _________• 1 X 10’ =________• 1 X 10 =________• 1 X 10 =________

Multiplication Patterns

• 7 X 8 = 56• (7 X 8) X 10’ = ______________

• (7 X 8) X 10 = _______________

• (7 X 8) X 10 = _______________

Multiplication Patterns

• • 6 X 5 = _______

• (6 X 5) X ______ = 300

• (6 X 5) X _______ = 3,000

• (6 X 5) X _______ = 30,000

Multiplication Patterns

• 9 X 5 = 45• (9 X 5) X 10’ = _____

• (9 X 5) X 10 = ______

• (9 X 5) X 10 = _______

Multiplication Patterns

• 3 X 7 = 21

• (3 X 7) X 10’ = _______

• (3 X 7) X 10 = ______

• (3 X 7) X 10 = _______

Multiplication Patterns

• 5 X 4 = _______

• (5 X 4) X ______ = 200

• (5 X 4) X ______ = 2,000

• (5 X 4) X ______ = 20,000

Multiplication Patterns

• 5 X 7 = ______

• (5 X 7) X ____ = 350

• (5 X 7) X _____ = 3,500

• (5 X 7) X _____ = 35,000

Multiplication Patterns

• 4 X 2 = 8

• (4 X 2) X 10 second =_______

• (4 X 2) X 10 third = _______

• (4 X 2) X 10 fourth = _______

Multiplication Patterns

• 6 X 7 = 42

• (6 X 7) X 10 second = ________

• (6 X 7) X 10 third = ________

• (6 X 7) X 10 fourth = _________

Multiplication Patterns

• Use mental math and a pattern to solve.

• (6X6) X 10’ = _____

• (7X4) X 10 ‘’’ = ________

• (9X8) X 10 ‘’ = ________

Multiplication Patterns

• (4X3) X 10’’ = ______________

• (2X5) X 10 ‘’’ = ____________

• (2X8) X 10 ‘’ = ____________

Multiplication Patterns

• (6X5) X 10’’’ = _________

• (8X8) X 10 ‘’’’ = ________

• (7X8) X 10 ‘’’’ = ________

Multiplication Patterns

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