Question

Give a rough estimate (by rounding
off to the nearest hundreds and also
a closer estimate C by rounding
Off to the nearest beris for the
followings 9543-729​

Answer 1

Answer:

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

Make four more such examples.

Solution 2:

(a) 439+334+4,317439+334+4,317

Rough estimate-

439+334+4,317\ \Rightarrow400+300+4,300\ =5,000439+334+4,317 ⇒400+300+4,300 =5,000

Closer estimate-

439+334+4,317\ \Rightarrow440+330+4,320\ \Rightarrow\ 5,090439+334+4,317 ⇒440+330+4,320 ⇒ 5,090

(b) 1,08,734-47,5991,08,734−47,599

Rough estimate-

1,08,734-47,599\ \Rightarrow1,08,700-47,600\ \Rightarrow61,1001,08,734−47,599 ⇒1,08,700−47,600 ⇒61,100 estimate-

1,08,734-47,599\ \Rightarrow1,08,730-47,600\ =61,1301,08,734−47,599 ⇒1,08,730−47,600 =61,130

(c) 8,325-4918,325−491

Rough estimate-

8,325-491\ \Rightarrow8,300-500\ =7,8008,325−491 ⇒8,300−500 =7,800

Closer estimate-

8,325-491\ \Rightarrow8,330-490\ =7,8408,325−491 ⇒8,330−490 =7,840

(d) 4,89,348-48,3654,89,348−48,365

Rough estimate-

4,89,348-48,365\ \Rightarrow4,89,300-48,400\ =4,40,9004,89,348−48,365 ⇒4,89,300−48,400 =4,40,900

Closer estimate-

4,89,348-48,365\ \Rightarrow4,89,350-48,370\ =4,40,9804,89,348−48,365 ⇒4,89,350−48,370 =4,40,980