# RS Aggarwal Class 6 Math First Chapter Number System Exercise 1D Solution

## EXERCISE 1D

1. Round each of the following numbers to the nearest ten:

(a) 36

Nearest ten is 40

(b) 173

Nearest ten is 170

(c) 3869

Nearest ten is 3870

(d) 16378

Nearest ten is 16380

2. Round each of the following numbers to the nearest hundred:

(a) 814

Nearest hundred is 800

(b) 1254

Nearest hundred is 1300

(c) 43126

Nearest hundred is 43100

(d) 98165

Nearest hundred is 98200

3. Round each of the following numbers to the nearest thousand:

(a) 793

Nearest thousand is 1000

(b) 4826

Nearest thousand is 5000

(c) 16719

Nearest thousand is 17000

(d) 28394

Nearest thousand is 28000

4. Round each of the following numbers to the nearest ten thousand:

(a) 17514

Nearest ten thousand is 20000

(b) 26340

Nearest ten thousand is 30000

(c) 34890

Nearest ten thousand is 30000

(d) 272685

Nearest ten thousand is 270000

Estimate each sum to the nearest ten:

5. (57+34)= 91

Nearest ten is 90

6. (43+78)= 121

Nearest ten is 120

7. (14+69)= 83

Nearest ten is 80

8. (86+19)= 105

Nearest ten is 110

9. (95+58)=153

Nearest ten is 150

10. (77+63)= 140

Nearest ten is 140

11. (356+275)= 631

Nearest ten is 630

12. (463+182)= 645

Nearest ten is 640

13. (538+276)= 814

Nearest ten is 820

Estimate each sum to the nearest hundred:

14. (236+689)=925

Nearest hundred is 900

15. (458+324)= 782

Nearest hundred is 800

16. (170+395)= 565

Nearest hundred is 600

17. (3280+4395)= 7675

Nearest hundred is 7700

18. (5130+1410)= 6540

Nearest hundred is 6500

19. (10083+29380)= 39463

Nearest hundred is 39500

Estimate each sum to the nearest thousand:

20. (32836+16466)= 49302

Nearest thousand is 49000

21. (46703+11375)= 58078

Nearest thousand is 58000

22. There are 54 balls in box A and 79 balls in box B. Estimate the total number of balls in both the boxes taken together.

Solution: The total number of balls in the both boxes is 54+79= 133 balls

Nearest thousand is 130

Estimate each difference to the nearest ten:

23. (53-18)= 35

Nearest ten is 30

24. (97-38)= 59

Nearest ten is 60

25. (409-148)= 261

Nearest ten is 260

Estimate each difference to the nearest hundred:

26. (678-215)= 463

Nearest hundred is 500

27. (957-578)= 379

Nearest hundred is 400

28. (7258-2429)= 4829

Nearest hundred is 4900

29. (5612-3095)= 2517

Nearest hundred is 2500

Estimate each sum to the nearest thousand:

30. (35863-27677)= 8186

Nearest thousand is 8000

31. (47005-39488)= 7517

Nearest thousand is 8000

Updated: May 30, 2022 — 11:32 am