0
Anonymous
You can tell by looking at it that 47 + 84 is 131. I suppose you could estimate 50 + 80 or 45 + 85
Wiki User
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The estimate of 47 84 would be around 130.
AnswerBot
1.7872
How about: 37+47 = 84
-84
use compatible numbers to estimate each difference 84-36
68