Practice the questions given in the worksheet on estimate the numbers to its nearest tens, hundreds and thousands. The questions are best on rounding off the number to its nearest tens, rounding off the number to its nearest hundreds and rounding off the number to its nearest thousands.
1. Round off to the nearest tens:
(i) 9 (ii) 62
(iii) 45 (iv) 84 (v) 125 
(vi) 385 (vii) 742
(viii) 5244 (ix) 9375 (x) 71577 
2. Round off to the nearest hundreds:
(i) 57 (ii) 137
(iii)253 (iv) 560 (v) 892 
(vi) 2450 (vii) 4977
(viii) 2881 (ix) 4550 (x) 42782 
3. Round off to the nearest thousands:
(i) 505 (ii) 851
(iii) 2502 (iv) 5317 (v) 5902 
(vi) 7379 (vii) 59993
(viii) 799531 (ix) 931865 (x) 640738 
4. (i) Round off 42, 97 and 359 to the nearest tens.
(ii) After rounding off, add them.
(iii) Round of the sum to the nearest hundreds.
5. (i) Round 642 and 273 to the nearest tens.
(ii) Find the difference of the rounding off numbers.
(iii) Round off the difference to the nearest hundreds.
6. A 2digit number was rounded off to the nearest tens and the result was 70. Find the interval of the original number.
7. A 3digit number was rounded off to the nearest tens and the result was 320. Find the interval of the original number.
8. A 4digit number was rounded off to the nearest tens and the result was 5760. Find the interval of the original number.
9. A 3digit number was rounded off to the nearest hundreds and the result was 500. Find the interval of the original number.
10. A 3digit number was rounded off to the nearest hundreds and the result was 900. Find the interval of the original number.
`Answers for the worksheet on estimate or rounding off the number to its nearest are given below to check the exact answers of the above questions.
Answers:
1. (i) 10 (ii) 60
(iii) 50 (iv) 80 (v) 130 
(vi) 390 (vii) 740
(viii) 5240 (ix) 9380 (x) 71580 
2. (i) 100 (ii) 100
(iii) 300 (iv) 600 (v) 900 
(vi) 2500 (vii) 5000
(viii) 3000 (ix) 4600 (x) 42800 
3. (i) 1000 (ii) 1000
(iii) 3000 (iv) 5000 (v) 6000 
(vi) 7000 (vii) 60000
(viii) 800000 (ix) 932000 (x) 641000 
4. (i) 40, 100, 360
(ii) 500
(iii) 1000
5. (i) 640, 270
(ii) 370
(iii) 400
6. 65 to 74
7. 315 to 324
8. 5755 to 5764
9. 450 to 549
10. 850 to 949
`Math Home Work Sheets
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