The original price for a case of paper is $12.88. the case of printer paper is on sale for 0.5 times the original price. how much will alison spend on 5 cases of printer paper if she buys them on sale?

What’s the improper fraction?

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)