never until u apply more arithmetical operations on it
30! 29
The time 10:30 plus 60 minutes (1 hour) = 11:30
-30 plus 60 = 30
9 + 2 + 30 - 5 + 18 - 19 = -1
30 + 80 = 110
-30
1/6 + 7/10 = 5/30 + 21/30 = 26/30 = 13/15
2+40+30=72
30 + 50 + 70 = 150
-1
it is 2hr and 15 mins
1 plus 30 is 31