Maths Tricks Multiplying By 9

This video tutorial introduces three math tricks to simplify multiplying numbers by 9. It begins with the hand trick, which uses fingers to multiply numbers 1-10 by 9. Next, it explains a pattern observation trick for single-digit numbers, highlighting a consistent pattern in results. Finally, a general multiplication trick is presented for any number, involving multiplication by 10 and subtraction. The video concludes with practice questions to reinforce learning.

What is the result of using the hand trick to multiply 9 by 7?

• 63

• 54

• 72

• 81

When using the pattern-based trick, what is the first step to multiply 8 by 9?

• Multiply the number by 10

• Divide the number by 2

• Add 1 to the number

• Subtract 1 from the number

Using the pattern-based trick, what is the result of 9 multiplied by 5?

• 45

• 63

• 54

• 36

What is the final step in the general trick for multiplying any number by 9?

• Multiply by 5

• Divide by 2

• Subtract the original number

• Add the original number

Using the general trick, what is 12 multiplied by 9?

• 108

• 96

• 102

• 112

What is the result of 15 multiplied by 9 using the general trick?

• 125

• 145

• 155

• 135

Which method would you use to multiply 9 by 3 quickly?

• None of the above

• General trick

• Hand trick

• Pattern-based trick