70
40
Because your calculator is broken. Seriously; 30 divided by half (0.5) is 60 and 60 + 10 = 70 So, 30 cut in half (30/2) is 15 but 30 DIVIDED BY half (30/0.5) is 60.
70: 30 divided by 1/2=60+10=70 trick: not 30 divided by 2
50
62.9
40
-10
Twenty divided in half is 20/2 = 10 Twenty divided by half is 20/(1/2) = 40
20
b ./
3.3333