Question

Give a rough estimate $($ by rounding off to nearest hundred $)$ and also a closer estimate $($ by rounding off to nearest tens $)$ of each of the following$:$

$543+628+5619$

Answer 1

Given numerical expression is $543+628+5619$

First find the sum by using rounding off to nearest tens$.$

Nearest ten's to $543$ is $=540$

Nearest ten's to $628$ is $=630$

Nearest ten's to $5619$ is $=5620$

Required sum $=540+630+5620$

$=6790$

Now find the sum by using rounding off to the nearest hundred$.$

Nearest hundred to $543$ is $=500$

Nearest hundred to $628$ is $=600$

Nearest hundred to $5619$ is $=5600$

Required sum $=500+600+5600$

$=6700$

Hence$,$ the sum of given numerical expression nearest to ten and hundred are $6790$ and $6700$ respectively$.$