John took a test with 80 questions.  For the first 40 questions, she got 90% right.  For the next 40 questions, she gets 95% right.  How many total questions does she get right?
He gets 40*.9=<T>multiply(40, 0.9)=36.0 questions right for the first part.
For the second part, he gets 40*.95=<T>multiply(40, 0.95)=38.0 questions right.
So he gets a total of 36+38=<T>add(36, 38)=74 questions right.
