<PRE><B>Question 1013030</B>
6327 X 7 is about 42,000 (6000 x 7)
7000*7=49,000.  But 6327 is closer to 6000, so the estimate is closer to 42,000 than it is to 49,000.
6742*8
first estimate: 7000*8=56,000 (too high)
second estimate: recognize that it is 8*6 3/4 thousands (6750 is 6 3/4 thousands)
8*6=48; 8*(3/4)=6
48+6=54,000, very close to true value.
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alternative estimate.
it is between 8*6000 and 8*7000 or between 48,000 and 56,000.
742 is closer to the higher thousand than the lower, so the estimate is closer to 56,000 than it is to 48,000.</PRE>