1. Multiplication Patterns
The Big Question !!!
How can you use a basic fact and a pattern to multiply by a 2 digit number??

2. 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??

3. 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 = __

4. 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?

5. 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) =

6. 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?

7. Multiplication Patterns
Use mental math to complete the pattern.
1 X 1 = _________
1 X 10’ =________
1 X 10 =________
1 X 10 =________

8. Multiplication Patterns
7 X 8 = 56
(7 X 8) X 10’ = ______________
(7 X 8) X 10 = _______________
(7 X 8) X = _______________

9. Multiplication Patterns
6 X 5 = _______
(6 X 5) X ______ = 300
(6 X 5) X _______ = 3,000
(6 X 5) X _______ = 30,000

10. Multiplication Patterns
9 X 5 = 45
(9 X 5) X 10’ = _____
(9 X 5) X 10 = ______
(9 X 5) X = _______

11. Multiplication Patterns
3 X 7 = 21
(3 X 7) X 10’ = _______
(3 X 7) X = ______
(3 X 7) X = _______

12. Multiplication Patterns
5 X 4 = _______
(5 X 4) X ______ = 200
(5 X 4) X ______ = 2,000
(5 X 4) X ______ = 20,000

13. Multiplication Patterns
5 X 7 = ______
(5 X 7) X ____ = 350
(5 X 7) X _____ = 3,500
(5 X 7) X _____ = 35,000

14. Multiplication Patterns
4 X 2 = 8
(4 X 2) X 10 second =_______
(4 X 2) X 10 third = _______
(4 X 2) X 10 fourth = _______

15. Multiplication Patterns
6 X 7 = 42
(6 X 7) X 10 second = ________
(6 X 7) X 10 third = ________
(6 X 7) X 10 fourth = _________

16. Multiplication Patterns
Use mental math and a pattern to solve.
(6X6) X 10’ = _____
(7X4) X 10 ‘’’ = ________
(9X8) X 10 ‘’ = ________

17. Multiplication Patterns
(4X3) X 10’’ = ______________
(2X5) X 10 ‘’’ = ____________
(2X8) X 10 ‘’ = ____________

18. Multiplication Patterns
(6X5) X 10’’’ = _________
(8X8) X 10 ‘’’’ = ________
(7X8) X 10 ‘’’’ = ________

19. Multiplication Patterns
Try these!!