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It is 640 because 4 is less than 5

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Wiki User

6y ago
This answer is:
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Kylie Hall

Lvl 1
3y ago
what is the answer
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Kylie Hall

Lvl 1
3y ago
show me how to get the number.
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Anonymous

Lvl 1
4y ago

650

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Q: How do you round 644 to the nearest ten?
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