Question

The students of grade 4 are doing a fundraiser. They sell candles for $22 each. Estimate the money raised by selling 289 candles by rounding to the nearest ten.

• A. $\$5800$
• B. $\$5600$
• C. $\$6000$

Answer 1

The correct option is A $\$5800$

Cost of 1 candle $=\$22$.
Total candles sold $=289$
So, total money raised by selling the candles $=289\times 22$
Now, By rounding off to the nearest $10$,
$22$ can be rounded of to $20$
And, $289$ can be rounded off to $290$.

$\Rightarrow 289\times 22\approx 290\times 20$
$\Rightarrow 289\times 22\approx 29\times 2\times 10\times 10$

$\Rightarrow 29\times 2=58$
$\Rightarrow 290\times 20=29\times 2\times 100=58\times 100$
$\Rightarrow 290\times 20=5800$
$\Rightarrow 292\times 22\approx 5800$
So, the students will be able to raise $\$5800$.