Division is the mathematical operation used in grouping a number into equal parts using another number. The price of one pill can be determined by dividing the total cost of a number of pills by that number.
Price of one pill = cost of 50 pills / 50
$2.05 / 50 = $0.04
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4 packs of notepads and 5 packs of sticky notes Explanation: if he needs the same number of both he needs to find the first number that 4 and 5 both go into. 4 x 5 = 20 so this is the least common multiple