A drill began digging a well 48 3/5 feet above sea level.When the work was complete,the drill had dug in to the ground to a depth of 12 1/2 feet below sea level.How far did the drill dig in all?
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so final height - initial height = distance.
Think sea level as 0, so
-12 1/2 - 48 3/5 = ?
and then take the absolute value of the answer, because distance can't be negative.
vicky191, think about it this way.
if a plane starts 2m above ground and stops at 4m above ground,
Wouldn't you do 4-2 to find the distance? ( you could also do 2-4 and take the absolute value. Either way the answer will be 2m.)
Similarly, you could do -12 1/2 - 48 3/5 as well as 48 3/5 - (-12 1/2).