We have learned quite a number of multiplication tricks now and in this post, I am going to teach you another multiplication trick which you can use to calculate faster and share with your friends. This multiplication trick is quite similar to **squaring a number ending in 5**.

The conditions to perform this trick are

(a) the sum of the ones digit is 10.

(b) the other digits (tens, hundreds, and so on) are the same.

**Example 1: 23 × 27**

This example fits the two conditions above. For (a), 3 + 7 = 10. Then, for (b) the tens digits are the same.

**The Math Trick**

Step 1: Add 1 to one of the tens digit, then multiply to the other tens digits. Continue reading