Friday, 24 April 2020

Multiply any whole number by 9

Multiply any whole number by 9

METHOD
Step 1. Multiply the original number (Multiplicand) by 10, or just add one zero (0) at the right-hand end of the number
Step 2. Subtract the original number or Multiplicand from the new number worked out in Step 1
Step 3. The difference is the answer.

Example 1. Consider 5 x 9
Step 1. 5 x 10 = 50 or 50
Step 2. 50 - 5
Step 3. Answer 45

Example 2. Consider 67 x 9
Step 1. 67 x 10 = 670 or 670
Step 2. 670 - 67
Step 3. Answer 603

Example 3. Consider 4813 x 9
Step 1. 4813 x 10 = 48130 or 48130
Step 2. 48130 - 4813
Step 3. Answer 43317

Multiply any whole number by 9
Number Step 1 Step 2 Step 3
5 5 x 10 = 50 or 50 50 - 5 = 45 45
67 67 x 10 = 670 or 670 670 - 67 = 603 603
4813 4813 x 10 = 48130 or 48130 48130 - 4813 = 43317 43317