10 + 30 = 40
40
10 + 10 + 10
The sum of 30 plus 10 plus 5 plus 5 is 50.
30 or -10 if the 20 is negative.
50 + 40 + 40 + 40 + 30 + 30 + 20 + 10 = 260
10 + 10 + 10 = 30
30/3=10
18 + 10 + 20 + 30 + 15 + 50= 143
30
18 + 2 + 10 = 30
30
30/0.5 + 10 = 70
10 + 20 = 30