## 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**