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Speed Math Squaring 2-digit Numbers ending with 1 Squaring and Square Roots

[Speed Math] SQUARING 2-DIGIT NUMBERS ENDING WITH 1

Here’s an example of a SPEED MATH shortcut for SQUARING 2-DIGIT NUMBERS ENDING WITH 1 : (Sq) LD1d2 from the SQUARING AND SQUARE ROOTS category.

Squaring 2-digit Numbers ending with 1

When can I use this method?

For squaring 2-digit numbers ending with 1.

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pdf Download Practice sheet for SQUARING 2-DIGIT NUMBERS ENDING WITH 1

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Notes –

  1. This method uses the concept (a + 1)2 = a2 + [(a + 1) + a], where ‘(a + 1)’ is the number ending with 1.


Related Shortcuts –

Squaring 2-digit Numbers ending with 4: (Sq) LD4d2
Squaring 2-digit Numbers ending with 6: (Sq) LD6d2
Squaring 2-digit Numbers ending with 9: (Sq) LD9d2


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