Tricks to multiply a number by 39

Tricks to multiply a number by 39

Example: 1

26 * 39

Step 1:

Multiply 26 by 4

26 * 4 = 104

Step 2:

Multiply 104 by 10

104 * 10 = 1040

Step 3:

Subtract 26 from 1040

1040 - 26 = 1014

26 * 39 = 1014

 Example: 2

125 * 39

Step 1:

Multiply 125 by 4

125 * 4 = 500

Step 2:

Multiply 500 by 10

500 * 10 = 5000

Step 3:

Subtract 5000 from 125

5000 - 125 = 4875

125 * 39 = 4875

Example: 3

342 * 39

Step 1:

Multiply 342 by 4

342 * 4 = 1368

Step 2:

Multiply 1368 by 10

1368 * 10 = 13680

Step 3:

Subtract 342 from 13680

13680 - 342 = 13338

342 * 39 = 13338