• 9 years ago
For more details go to www.abellna.com website.

A full mental math video may contain 2-8 examples. Only some examples are provided in a given video for demonstration purposes.

This is probably the easiest mental math technique used for squaring any whole numbers with just 1s.

11 x 11
111 x 111
1111 x 1111
11111 x 11111

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