Question

Estimate the following by rounding to the nearest tens:

$23406+16708$

Answer 1

Procedure to Round Off a number to the nearest tens:

1. See the digit at the ones place of the given number.
2. If the digit at the ones place is less than $5$, then replace the digit of the ones place by '$0$' and keep the other digits as they are.
3. If the digit at the ones place is '$5$‘ or more than ’$5$‘, then replace the digit at the ones place by ’$0$‘ and increase the digit at the tens place by ’$1$'.

Here, In $23406$ the digit at ones place is $6$ and '$6>5$', So it will be rounded off to $23410$

In '$16708$‘, the digit at ones place is ’$8$‘, and ’$8>5$', So it will be rounded off to $16710$

$\therefore$ Estimated value of $23406+16708=23410+16710$

$=40120$

Therefore, the answer is $40120$