30 + (30-10) = 50
10 + 10 + 10
30 + 10 + 5 + 5 = 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 plus 20 plus 30plus 40 plus 50 equals 150 because 50 plus 40 equals 90 plus 30 =120+20= 140 then + 10 = 150