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Speed Math Squaring and Square Roots Squaring Numbers ending with 5

[Speed Math] SQUARING NUMBERS ENDING WITH 5

Here’s an example of a SPEED MATH shortcut for SQUARING NUMBERS ENDING WITH 5 : (Sq) LD5dx from the SQUARING AND SQUARE ROOTS category.

Squaring Numbers ending with 5

When can I use this method?

For squaring 2-digit numbers or 3-digit numbers ending with 5.

One can also use this method to solve higher digit numbers as long as multiplication of numbers is easy enough.

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pdf Download Practice sheet for SQUARING NUMBERS ENDING WITH 5

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Notes –

  1. This method uses the concept (a + 5)2 = [a (a + 10)] + 25, where ‘(a + 5)’ is the number ending with 5 and ‘a’ is the tens place value of that number.

Related Shortcuts –

None

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