Addition and Subtraction  -  Solve each problem.

Ex. (inches in a foot) - (quarts in a gallon) = 12 - 4 = 8

1. (hours in a day) + (inches in a foot) + (days of the week) =

2. (legs on an octopus) + (this year) + (wheels on a tricycle) =

3. (states in the U.S.) - (number of continents) =

4. (a pair) + (days in February) + (sides on a stop sign) =

5. (cents in a dollar) - (Snow White's dwarfs) - (sides of a pentagon) =

6. (U.S. states starting with an "A") + (U.S. states ending with an "A")  =

7. (seconds in a minute) + (ounces in a pound) + (months in a year) =

8. (minutes in a pro football game) - (stripes on the U.S. flag) =

9. (U.S. Presidents) + (days in January) - (cards in a deck) =

10. (U.S. states touching an ocean) - (U.S. states touching a Great Lake) =

11. (years in a century) + (Santa's reindeer) + (weeks in a year) =

12. (days in a year) + (feet in a yard) - (cents in a quarter) =

13. (inches in a yard) + (innings in a baseball game) + (3 dozen) =

14. (days in July) + (sides of a trapezoid) - (one syllable states) =

15. (dalmatians) - (little pigs) - (one half minute) =

16. (three quarters) + (room number) + (pages in math book) =

17. (U.S. states bordering Canada) + (U.S. Senators) =

Bonus -  (one gross) + (one decade) + (degrees in a circle) =