1000 quarters
No.
290 - 30 = 260
54.5 kilograms would be a better estimate.
It is ok, but you could get better estimates.
choose 5, 10, 25, or 100 as the most reasonable interval for 201, 450, 550, 600, 799
No 100 is not a reasonable estimate
No.
25 * 4 = 100 seems reasonable. The exact answer is 102.59
a moderate estimate, not expensive, reasonable in price
Estimate the answer. If the calculated answer is close to the estimate then it is reasonable.
12 centimetres is a reasonable estimate.
You can cut the 100 dollar bill into 4 quarters. (Whether this is legal or not is a different matter.) a quarter = $0.25 → $1 = 4 quarters → $100 = 100 × 4 quarters = 400 quarters → there are 400 quarters in $100.
No it is not. 88.22 times 100 is 8822 which is nowhere near 915.25!
Four. * * * * * There are four quarters in one whole so there are 100*4 = 400 quarters in 100.
For multiplication or division, the only reasonable estimate is -2.
100 quarters = 100*1/4 = 25 wholes.
If they're silver quarters, about $4000. If ordinary quarters, just $100.