Tuesday, November 15, 2011

Diana`s Math Question.

14. Saida owned 125 shares of an oil company. One day, the value of each share dropped by \$0.31. The next day, the value of each share rose by \$0.18. What was the total change in the value of Saida's shares?
What we know:
-Saida owns 125 shares.
-drops by \$0.31
-rose by \$0.18
drops means it went down. (-)
rose means it went up. (+)
(-\$0.31)+ \$0.18= -\$0.13
Now, multiply -\$0.13 by 125.
125(-\$0.13) = -\$16.25
The total change in the value of Saida's share was \$16.25.

1. Great job Diana! I really like how you showed the integer signs for drop and rose. I think the only thing you should've done was tell us why you mulitplied \$0.13 by 125.

2. Good job Diana! I like how you explained really well on how you got your answer. I also like that you showed what rose and drop means using integer signs. I think that what you could've done was explain a bit more in each step like why is (-\$0.31) + \$0.18 is \$0.13 and not \$0.49. But overall good job.