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 Try these!!