Question 2(d)

Give a rough estimate (by rounding off to nearest hundreds) and also a closer estimate
(by rounding off to nearest tens):
4,89,348 – 48,365

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Solution

By rounding off to nearest hundreds , the rough estimate of their difference will be:

$\begin{matrix} 489348 r o u n d o f f t o & = 489300 48365 r o u b d o f f t o & = 48400 E s t i m a t e d d i f f e r e n c e & = 440900 \end{matrix}$

By rounding off to nearest tens

$\begin{matrix} 489348 r o u n d o f f t o & = 489350 48365 r o u b d o f f t o & = 48370 E s t i m a t e d d i f f e r e n c e & = 440980 \end{matrix}$

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