Question

Estimate the difference of 10,512 and 21,340 by rounding off each number to its nearest thousand.

Answer 1

10,512 rounded off to nearest thousand gives 11,000 as hundreds digit is 5.

21,340 rounded off to nearest thousand gives 21,000 as hundreds digit 3 is less than 5.

So, the estimated difference
= 21,000 - 11,000 = 10,000