Koerarmoca Posted March 20, 2013 Share Posted March 20, 2013 100-3(6-5+1)3 (the 3 is an exponent) our answer does not match what the sites answer is Can someone do this (show your work please lol) so we can figure out where we are going wrong to not get the same answer. It is going to make me crazy lol Quote Link to comment Share on other sites More sharing options...
Arcadia Posted March 20, 2013 Share Posted March 20, 2013 100-3(6-5+1)^3 = 100 - 3(2)^3 = 100 - 3(8) = 100 - 24 = 76 Quote Link to comment Share on other sites More sharing options...
nmoira Posted March 20, 2013 Share Posted March 20, 2013 100-3(6-5+1)3 100 - 3(6-5+1)^3 = 100 - 3(2)^3 = 100 - 3(8) = 100 - 24 = 76 Quote Link to comment Share on other sites More sharing options...
nmoira Posted March 20, 2013 Share Posted March 20, 2013 100-3(6-5+1)^3 = 100 - 3(2)^3 = 100 - 3(8) = 100 - 24 = 76 That looks eerily familiar. :D Quote Link to comment Share on other sites More sharing options...
Koerarmoca Posted March 20, 2013 Author Share Posted March 20, 2013 Thank you! Quote Link to comment Share on other sites More sharing options...
Haiku Posted March 21, 2013 Share Posted March 21, 2013 I got 76, too. Tara Quote Link to comment Share on other sites More sharing options...
AMJ Posted March 21, 2013 Share Posted March 21, 2013 I got this same answer, using the same order if operation. Were you getting a 0 inside the parentheses, instead of a 2? The temptation is to treat subtraction as if it could be done in any order, but order does count with both subtraction & division. Hence, inside the parentheses work the operations in left-to-right order. Now, if the answer key has a different answer than 76 you should notify the publisher of the error. If they insist theirs is correct ask them to show and explain how they got their answer. And (good-naturedly) ask if you could get some small gimme for helping identify an error! Quote Link to comment Share on other sites More sharing options...
Laura in STL Posted March 22, 2013 Share Posted March 22, 2013 I got this same answer, using the same order if operation. Were you getting a 0 inside the parentheses, instead of a 2? The temptation is to treat subtraction as if it could be done in any order, but order does count with both subtraction & division. Hence, inside the parentheses work the operations in left-to-right order. Now, if the answer key has a different answer than 76 you should notify the publisher of the error. If they insist theirs is correct ask them to show and explain how they got their answer. And (good-naturedly) ask if you could get some small gimme for helping identify an error! You can do the addition in the parenthesis first if you realize that it's -5+1 not 5+1. The expression in the parenthesis then simplifies from (6-5+1) to (6-4), which is also 2. It's easier to just do it left to right, though. Quote Link to comment Share on other sites More sharing options...
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