Answers

2015-09-29T14:43:59+08:00
The hundredth digit is 6, if we round down it will be 600, and if round up it will be 700. The next digit to 6 is 7, which when the digit next to the right of the hundredth digit is 5+, we need to round up. So rounding 678 to the nearest hundred is 800. 
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2015-10-02T21:09:12+08:00
Of course the answer is 700.
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