Answer:
5 calculators can be filled with a pack of 17 batteries
Explanation:
Given : A teacher brought a pack of 17 batteries
Each calculator uses 3 batteries.
To Find: How many calculator can the teacher fill with batteries?
Solution :
Since 3 batteries are used in 1 calculator
So, 1 battery is used in calculator =

So, 17 batteries are used in calculator =

=

So, 5 calculators can be filled fully with 15 batteries
2 batteries will be remaining
Hence 5 calculators can be filled with a pack of 17 batteries