10 subtracted by haft of 60 = -50
50 miles subtracted by 60 mintes = -10
50 miles subtracted by 60 min = -10
42 subtracted by 60 = -18
60
When we divide 30 by 1/2 , we get 60. On adding 10 to 60, we get 70. The answer is 70.
60 -15 = 45
60
60
-60
-12
1941 subtracted by 1931 = 10
-36