Question

Estimate the sum by rounding off to the nearest 1,000. Then, check the result by
finding the actual sum.
(a) There are 1,23,465 red roses, 1,10,250 white roses and 96,752 pink roses in a garden
Estimate the total number of roses in the garden.
(b) The population of village A is 53,628 and village B is 78,426. Estimate the total
population of the two villages.​

Answer 1

a) Red roses =1,23,456

Rounding off to the nearest 1000=1,23,000

white roses=1,10,250

rounding off to the nearest 1000=1,10,000

pink roses=96,752

rounding off to the nearest 1000=97,000

sum of total roses in the garden=3,30,000

actual sum=330458

330458 rounding off to a nearest 1000=3,30,000

b) population of A village=53,628

rounding off to the nearest 1000=54,000

population of village B=78,426

rounding off to the nearest 1000=78,000

sum of the population of the two villages= 1,32,000

actual sum=132054

132054 rounding off to a nearest 1000=1,32,000