Question

Give a rough estimate (by rounding off to nearest hundreds) and also a closer estimate
(by rounding off to nearest tens) :
(a) 439 + 334 + 4,317
(b) 1,08,734 – 47,599
(c) 8325 – 491
(d) 4,89,348 – 48,365

Answer 1

by rounding off to nearest hundreds
a)439 to 400
334 to 300
4317 to  4300
hence 400+300+4300=5000