Answer:
87-30=57
step-by-step Step-by-step explanation:
The question asked was how many more pennies are in the bowl than dimes so obviously u have to subtract but subtraction isn't as simple as you think.
for example if you had put subtract it like this
30-87 the answer would have been -57 so to simply avoid that you will have to put 87-30 to get a positive answer