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1521

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Gianni Wilderman

Lvl 10
3y ago
This answer is:
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Wiki User

14y ago

Don't you have a calculator on your computer?

Another way:

40 * 40 = 1600

1600 - 40 = 1560

1560 - 39 = 1521

Therefore 39 * 39 = 1521

Now wasn't that easy?

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Q: What is the answer of 39 multiply 39?
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