# S Chand ICSE Mathematics Class 6 Solution First Chapter Numbers Exercise 1F (O.P. Malhotra,  S.K. Gupta, Anubhuti Gangal)

Exercise 1 (F)

(1) Round off to the nearest 10.

(i) 42

Ans:- 40

(ii) 15

Ans:- 20

(iii) 94

Ans:- 90

(iv) 87

Ans:- 90

(v) 153

Ans:- 150

(vi) 366

Ans:- 370

(vii) 792

Ans:- 790

(viii) 478

Ans:- 480

(ix) 975

Ans:- 980

(x) 1493

Ans:- 1500

(xi) 8799

Ans:- 8000

(xii) 6932

Ans:- 6930

(2) Round off to the nearest 10, what numbers could be estimated as:

(i) 60 [Hint. 55, 56, 57, 58, 59, 61, 62, 63, 64]

(ii) 40

Ans:- 35, 36, 37, 38, 39, 41, 42, 43, 44

(iii) 130

Ans:- 125, 126, 127, 128, 129, 131, 132, 133, 134

(iv) 780

Ans:- 775, 776, 777, 778, 779, 781, 782, 783, 784

(v) 1600

Ans:- 1595, 1596, 1597, 1598, 1599, 1601, 1602, 1603, 1604

(vi) 4000

Ans:- 3995, 3996, 3997, 3998, 3999, 4001, 14002, 4003, 4004

(3) Round off each of the following to the nearest hundred.

(i) 463

Ans:- 500

(ii) 795

Ans:- 800

(iii) 1348

Ans:- 1300

(iv) 2687

Ans:- 2700

(v) 7765

Ans:- 7800

(vi) 28481

Ans:- 28500

(vii) 6008

Ans:- 6000

(viii) 60705

Ans:- 60700

(4) Round off each of the following numbers to the nearest thousand.

(i) 600 Sol. Numbers from 599 and 601 to 649

(ii) 900

Ans:- From 850 to 899 and 901 to 949

(iii) 1300

Ans:- From 1250 to 1299 and 1301 to 1349

(iv) 6500

Ans:- From 6450 to 6499 and 6501 to 6549

(v) 20,000

Ans:-  From 19950 to 19999 and 20001 to 20049

(5) Round off each of the following numbers to the nearest thousand.

(i) 3939

Ans:- 4000

(ii) 6139

Ans:- 6000

(iii) 5789

Ans:- 6000

(iv) 9893

Ans:- 1000

(v) 2235

Ans:- 2000

(vi) 40386

Ans:- 40000

(vii) 18589

Ans:- 19000

(viii) 3,18,500

Ans:- 3,19,000

(ix) 2,45,376

Ans:- 2,45,000

(x) 15,65,680

Ans:- 15,66,000

(6) What number will be rounded off to each of the following numbers to the nearest thousand?

(i) 11,000

Ans:- 10,500 to 10,900 and 11,001 to 11,449

(ii) 12,000

Ans:- 19,500 to 19,999 and 20,001 to 20,449

(iii) 4000

Ans:- 3,500 to 3,999 and 4,001 to 4,449

(iv) 68,000

Ans:- 67,500 to 67,999 and 68,001 to 68,449

(7) Give the estimation to the nearest ten, hundred and thousand.

(i) 792

Ans:- 790, 800

(ii) 235

Ans:- 240 , 200

(iii) 8235

Ans:- 8270, 8300, 8000

(iv) 9852

Ans:- 9850, 9900, 10000