The correct option is
C Number of toys sold = 10,000 (Estimated to nearest hundreds)
Balloons used in 1 shop = 112
Number of days = 91
So, number of balloons to be used for 91 days = 112 × 91
Rounding off the numbers to their
nearest tens:

So, the final result is:

Rounding off the numbers to their
nearest hundreds:

So, the final result is:

The actual number of toys sold by the shop in 91 days is:

Comparing the three results, we see:

So, by estimating to the nearest hundreds, the value become close to the actual answer.
∴ Numbers of toys sold approximately will be 10,000 .