Exam 2: Subtraction

When subtracting two numbers it is sometimes necessary to borrow from the number in the adjacent column.

An assembly drawing has 77 parts. The first drafter details 12 parts. The second drafter details 16 parts. The third drafter details 14 parts. How many parts are not yet drawn?

In a two digit whole number the first column from the right in the number represents units.

A CAD drafter's time limit for a specific job is 505 hours. The drafter recorded the following number of hours she worked each day on her time sheet: 36 hr., 37 hr., 40 hr., 42 hr., 52 hr., 48 hr., 37 hr., and 42 hr. How many more hours does she have left to finish the job?

A CAD drawing of a large building contains a total of 890 symbols including 110 windows, 66 doors, 30 appliances, 218 lighting fixtures, 341 electrical switches, and 95 mechanical equipment symbols. How many other symbols are on the drawing?

Subtract the following numbers to obtain the difference: 3,973 inches - 1,029 inches

During one month, 217 working drawings are submitted to a company checking team. Only 169 drawings are checked and returned to the drafters. How many drawings are not yet returned?

Subtract the following numbers to obtain the difference: 553 yards - 49 yards

Subtract the following numbers to obtain the difference: 4,251 feet - 976 feet

A large assembly drawing contains 112 different parts that need to be detailed. A team of CAD drafters has detailed the following number of parts: 9, 6, 12, 11, 7, 14, and 10. How many parts still need to be detailed?