Here’s an example of a SPEED MATH shortcut for SQUARING 3-DIGIT NUMBER : (Sq) 3D from the SQUARING AND SQUARE ROOTS category.
When can I use this method?
For squaring any 3 digit number.
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Download Practice sheet for SQUARING 3-DIGIT NUMBER
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Notes –
- Notice the way the individual values are added.
- This method uses the concept of (a + b +c)2 = a2 + b2 + c2 + 2ab + 2bc + 2ac
Related Shortcuts –
Squaring 2-digit Number: (Sq) 2D
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