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Question
Give a rough estimate (by rounding off to nearest hundreds) and also a closer estimate (by rounding off to nearest tens):
8246 - 6312
Sum
Solution
Rounding off to the nearest hundreds
8246 - 6312 = 8200 - 6300
= 1900
Rounding off to the nearest tens
8246 - 6312 = 8240 - 6310
= 1930
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