Easily square numbers from 501 to 599.
Example
{% scaleimage l310_example.png %}
Step 1
Square the last 2 digits.
{% scaleimage l310_step1.png %}
Step 2
Multiply the last two digits by 1000.
05 x 1000 = 5000
Step 3
Add the results of step 1 and step 2.
5000 + 25 = 5025
Step 4
Add 250000 to the result of step 3.
250000 + 5025 = 255025
{% scaleimage lesson_underline.png %}