-580
82 subtract by 20 = 62
600 x .15 = 90$ now subtract 90$ from 600$ and you get 510$
64
600 * 8 = 4,800
To find out how many 20s are in 600, you divide 600 by 20. This calculation gives you 600 ÷ 20 = 30. Therefore, there are 30 instances of 20 in 600.
Exactly 20 of them
Subtract a negative 1. 19 - (-1) = 20
30
30
600
20
600