There are 248 pages in a book. Joanna can read 16 pages per hour. On Monday, she reads for 3 hours. On Tuesday, she reads for 6.5 hours. How many more hours does she need to read to finish the book?
On Monday, Joanna reads 3*16=<T>multiply(3, 16)=48 pages.
On Tuesday, Joanna reads 6.5 * 16 =<T>multiply(6.5, 16)=104.0 pages.
So far, she has read 48 +104 =<T>add(48, 104)=152 pages.
Thus, she has 248-152 = <T>subtract(248, 152)=96 pages left.
She will need to read for 96/16 = <T>divide(96, 16)=6.0 hours to finish the book.
