9 multiplication table
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This document provides an easy trick for multiplying numbers by 9 without a calculator. The trick involves using your hands to represent numbers 1-10. To multiply a number by 9, put down the corresponding finger on your hands and count the fingers to the left and right to get the digits of the answer. Several examples are shown multiplying numbers 1-10 by 9 using this hand trick.
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This document contains instructions for several math tricks and puzzles. The 7-11-13 trick involves multiplying a 3-digit number by 7, 11, and 13 and writing the number twice to get the answer. The 3367 trick has a friend pick a 2-digit number and multiply it by 3367 then divide the answer by 3 to find the original number. The missing digit trick has a friend write a 4+ digit number, add the digits, subtract from the number, cross out a digit, and say the remaining digits for the solver to identify the missing digit.
Tricky math shortcut
The document provides several mental math techniques for multiplying numbers by 11, 9, 4, 5 and squaring 2-digit numbers. It explains how to use your hands to multiply by 9 and offers methods like separating digits and adding them or doubling numbers to quickly calculate multiplications and squares in your head without paper.
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9 multiplication table
- 1. #9 Multiplication Table On Your Hands
- 2. A Little Trick to Help You With The Multiplies of 9. No Calculator Needed
- 4. Your left hand is #’s 1 through 5
- 5. Thumb being 1 and pinky being 5
- 6. Your right hand is #’s 6 through 10
- 8. The fingers to the left of the finger you put down is the first number, # on the left
- 9. The fingers to the right of the finger you put down is the second number, # on the right
- 11. Hold Your Hands Up in Front of You.
- 12. 1 x 9 Put finger #1 down and count the fingers to the left and right.
- 13. So 1 x 9 = 9
- 14. 2 x 9 Put finger #2 downand count the fingers to the left and right.
- 15. So 2 x 9 = 18
- 16. 3 x 9 Put finger #3 downand count the fingers to the left and right.
- 17. So 3 x 9 = 27
- 18. 4 x 9 Put finger #4 down and count the fingers to the left and right.
- 19. So 4 x 9 = 36
- 20. 5 x 9 Put finger #5 down and count the fingers to the left and right.
- 21. So 5 x 9 = 45
- 22. 6 x 9 Put finger #6 down and count the fingers to the left and right.
- 23. So 6 x 9 = 54
- 24. 7 x 9 Put finger #7 down and count the fingers to the left and right.
- 25. So 7 x 9 = 63
- 26. 8 x 9 Put finger #8 down and count the fingers to the left and right.
- 27. So 8 x 9 = 72
- 28. 9 x 9 Put finger #9 down and count the fingers to the left and right.
- 29. So 9 x 9 = 81
- 30. 10 x 9 Put finger #10 down and count the fingers to the left and right.
- 31. So 10 x 9 = 90
- 32. Now that you have learned to use your hands to help you do multiplication with the #9. Lets use our hands to do one more thing.
- 33. Give yourself a pat on the back.