Math Shortcut: Squaring Numbers from 30 to 50

In the previous post, we have learned an interesting math shortcut on squaring numbers from 50 to 70. Before we explain why the shortcut works, we first continue this series by learning a shortcut on squaring numbers from 30 to 50. Notice that the steps are almost similar. Example 1: 472 Step 1: First, consider how […]

Squaring Numbers From 80 To 100

In the previous post, we have learned how to square 2-digit numbers mentally. In this post, we learn specifically another strategy on how to square numbers from 80 to 100. Steps in Squaring Numbers From 80 to 100 Step 1: Subtract the number from 100. Step 2: Square the difference. Step 3: Subtract the result […]