Here’s an example of a **SPEED MATH** shortcut for **SQUARING 2-DIGIT NUMBERS ENDING WITH 9 : (Sq) LD9d2** from the **SQUARING AND SQUARE ROOTS** category.

**When can I use this method?**

For squaring 2-digit numbers ending with 9.

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** Download Practice sheet for SQUARING 2-DIGIT NUMBERS ENDING WITH 9**

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**Notes –**

- This method uses the concept (a – 1)
^{2}= a^{2}– [(a – 1) + a], where ‘(a – 1)’ is the number ending with 9.

**Related Shortcuts –**

Squaring 2-digit Numbers ending with 1: (Sq) LD1d2

Squaring 2-digit Numbers ending with 4: (Sq) LD4d2

Squaring 2-digit Numbers ending with 6: (Sq) LD6d2

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