3 years ago

The estimation of 53 times 39

2 answers:

8 0

Round each and multiply.
53 rounds down to 50,
39 rounds up to 40.

50*40=2000.
This is close to the actual answer, which is 2067.

tatiyna3 years ago

6 0

53
X 39
--------
477
159⬇️
---------
2067

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kherson [118]

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$\|\nabla f(2,-3,5)\|=\dfrac{\sqrt{659}}{25}$

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