Mrs. Carlson wrote the following question for her class: "Ricardo's basketball team is selling raffle tickets, Each ticket costs
$0.75, They want to sell $285 worth of raffle tickets. So far, they have sold $75 worth of tickets. How many tickets do they still need to sell?" Some of the student responses are shown in the table below: Michelle's respone was 285 - 75 = 210 and 210 + 0.75 = 28, Kaley's respone was 285 - 75 = 210 and 210 + 0.75 = 210.75, Eva's response was 285 - 75 is 210 and 210 + 0.75 = 280, Rebecca's response was 285 - 75 = 210 and 210 + 0.75 = 118. Which students answered Incorrectly? Why are they wrong?
They have sold 100 tickets so far ($75), they need to sell 380 ($285) tickets in total and need to sell 280 more tickets.
Michelle was wrong because she should have divided 210 (how much more money they need to sell on tickets) into .75 (which is how much each ticket costs).
Kaley was wrong because she should have also divided 210 into .75 like Michelle.
