Question

Water is draining out of a 25 gallon cooler at a rate of 3 gallons a minute. How much water is left in the cooler after 5 minutes?

Answer 1

3•5=15
25-15=10

You will have 10 gallons left

Answer 2

Minute 1:
25 - 3 = 22

Minute 2:
22 - 3 = 19

Minute 3:
19 - 3 = 16

Minute 4:
16 - 3 = 13

Minute 5:
13 - 3 = 10

After 5 minutes, your cooler has 10 gallons left inside it.