<PRE><B>Question 1132909</B>
jane runs 12 miles a day.


how many miles does she run in 76 days?


12 * 80 = 960


12 * 70 = 840


75 is close to 76 and halfway between 70 and 80, therefore your answer will be halfway between 840 and 960.


960 - 840 = 120.


half of 120 = 60


add 60 to 840 to get 900


subtract 60 from 960 to get 900.


that would make the estimate about 900.


another way to estimate would be 10 * 75 + 2 * 75 = 750 + 150 = 900.




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