When multiplying the number 5 by an even number, there is a quick way to find the answer. This is speed math trick 6. Please check other speed math tricks here.

For example, 5 x 4 = ?

Step 1: Take the number being multiplied by 5 and cut it in half, this makes the number 4 become the number 2.
Step 2: Add a zero to the number to find the answer. In this case, the answer is 20.

so, 5 x 4 = 20

Another example, 5 x 824 = ?

Step 1: Take the number being multiplied by 5 and cut it in half, this makes the number 824 become the number 412.
Step 2: Add a zero to the number to find the answer. In this case, the answer is 4120.

so, 5 x 824 = 4120

When multiplying an odd number times 5, the formula is a bit different.

For instance, consider 5 x 3 = ?

Step 1: Subtract one from the number being multiplied by 5, in this instance the number 3 becomes the number 2.
Step 2: Now halve the number 2, which makes it the number 1. Make 5 the last digit. The number produced is 15, which is the answer.

5 x 3 = 15

Another example 5 x 713 = ?

Step 1: Subtract one from the number being multiplied by 5, in this instance the number 713 becomes the number 712.
Step 2: Now halve the number 712, which makes it the number 356. Make 5 the last digit. The number produced is 3565, which is the answer.

5 x 713 = 3565

Write down your feedback on comments section below.

Don’t forget to share. Please subscribe to MathAdmin here for math tricks and help.