III. Add and subtract. Perform first the operation inside the parenthesis. Write the answers on the blanks. 16. (36 + 55) - 66 17. ( 91 - 79 ) + 45 - 66 samoldoiani hod One 18. ( 26 + 67 ) - 38 19. ( 47 + 245 ) - 45 - 38 20. (312 - 112) + 91 ​