Don’t forget to explain how you know the answer choice you chose is the correct solution!

  Mark buys a wooden board that is 7 1/2 ft. long. The cost of a wooden board is $0.50 per foot including tax. How much is the cost, in dollars of the wooden board?

While grading student papers, I noticed that while computing the product of 4.5 and 1.2, this student carefully lined up the decimals and then multiplied, bringing the decimal point straight down and reporting a product of 54.0. Is this solution correct or incorrect? Defend your choice either way with a DETAILED explanation as to why […]