Answer:
Step-by-step explanation:
Rounding numbers:
If the digit we are looking is 4 or lower, we round down.
Otherwise, we round up.
In this question:
495:
We look at the final digit, which is 5. Since it is five or higher, we round up, and the nearest 10 is 500.
504:
We look at the final digit, which is 4. Since if is lower than 5, we round down, and the nearest 10 is 500.
