assessment, estimation, belief, guess, measure, judgment, projection, opinion, view, survey, rating, surmise, thought, valuation
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If you say, "I estimate that..." then it's a verb, because it is an action. In other words, it takes the place of "do" in "I do...." If you say, "By my estimate,..." then it's a noun, because it is something of yours. In other words, you can say, "My car..." and we all know "car" is a noun.
other words for multiplication
To the nearest ten, 1240, 1050 and 980 respectively.
The best estimate is, obviously, the exact value, which is 217557 since any other estimate will be inferior.Since the operation is multiplication a workable estimate is obtained by rounding one number down and the other one up. This would give 3100*70 = 217000.
There is no "best" estimate other than the exact answer since any other estimate can be improved with some effort.3.2*5 = 163.5*4 = 14 so I would go for 15.