## ML Aggarwal Class 6 Solutions for ICSE Maths Chapter 1 Knowing Our Numbers Ex 1.4

Question 1.

Round off each of the following numbers to their nearest tens:

(i) 77

(ii) 903

(iii) 70 1205

(iv) 999

Solution:

Question 2.

Estimate each of the following numbers to their nearest hundreds:

(i) 1246

(ii) 32057

(iii) 53961

(iv) 555555

Solution:

Question 3.

Estimate each of the following numbers to their nearest thousands:

(i) 5706

(ii) 378

(iii) 47,599

(iv) 1,09,736

Solution:

Question 4.

Give a rough estimate (by rounding off to nearest hundreds) and also a closer estimate (by rounding off to nearest tens):

(i) 439 + 334 + 4317

(ii) 8325 – 491

(iii) 1,08,734-47,599

(iv) 4,89,348 – 48,365

Solution:

Question 5.

Estimate each of the following by rounding off each number nearest to its greatest place:

(i) 730 + 998

(ii) 5,290 + 17,986

(iii) 796-314

(iv) 28,292 – 21,496

Solution:

Question 6.

Estimate the following products by rounding off each of its factors nearest to its greatest place:

(i) 578 × 161

(ii) 9650 × 27

Solution:

Question 7.

Estimate the following products by rounding off each of its factors nearest to its hundreds place:

(i) 5281 × 3491

(ii) 1387 × 888

Solution: