Question

Jesse bought some erasers that cost $0.19 each and a ruler for $0.69. How many erasers did jesse buy if the total cost was $2.40. [ignore sales tax]

Answer 1

He bought 9 erasers.

I know this because if the total cost is $2.40 and the ruler is $0.69 then all you need to do is subtract 0.69 from 2.40. The divide the answer by 0.19.

2.4-0.69 = 1.71

1.71÷0.19 = 9