Page 215 - Maths Class 05

7. a. The other number is 357. b. Let’s understand through an example.
Subtraction Addition Subtraction Addition
100 75 100 25
– 25 + 25 – 75 + 75
75 100 25 100
Hence, subtraction process is the reverse of addition process.
8. a. 379 b. 0 9. 9782315 10. 912248827 11. 18760236 12. 1782347 13. 6783513
Practice 2.3
1. ` 832340 2. 9824882 degrees 3. ` 1286420 4. 38136436 newspapers
5. The other number is 8954572 6. Total number of students is 928387. Number of boys is 326042.
Practice 2.4
1. 623304 2. 753504 3. 453525 4. 710790 5. 188385 6. 92825
7. 840567 8. 458541 9. 414346 10. 1045568 11. 1382290 12. 2191770
Practice 2.5
1. 2783102 2. 2461716 3. 2521476 4. 3353828 5. 1180564 6. 2304064
7. 32113458 8. 39501642 9. 37528212 10. 27063564 11. 11994024 12. 11849409
Practice 2.6
1. a. 1160612 b. 1122304 c. 4539715 d. 1320192 e. 44859108 f. 34241400 g. 13347062 h. 42253587
i. 14812952 j. 105505162 k. 227517264 l. 385106532 2. a. 4950 b. 43800 c. 9870000
d. 40950000 e. 148000 f. 769000000 3. a. 18900 b. 251700 c. 305600 d. 20888000
e. 4500000 f. 2000000 4. 1219586 sugar bags 5. ` 22705182 6. 40799592
Practice 2.7
1. a. Q = 25, R = 6 b. Q = 56, R = 98 c. Q = 815, R= 613 d. Q= 859, R = 2628 e. Q = 495, R = 187
f. Q = 49, R = 567 g. Q = 90, R = 5671 h. Q = 859, R = 1736 i. Q = 954, R = 321
2. a. Q = 1752, R = 44 b. Q = 10938, R = 86 c. Q= 6489, R = 53 d. Q= 14684, R = 21
e. Q = 2574, R = 12 f. Q = 1306, R = 114 g. Q = 4002, R = 109 h. Q = 3418, R = 2337 i. Q = 324, R = 0
3. a. Q = 1907, R = 15; Verification : 1907 × 364 + 15 = 694148 + 15 = 694163
b. Q = 3201, R = 18; Verification : 3201 × 524 + 18 = 1677324 + 18 = 1677342
c. Q= 200, R = 104; Verification : 200 × 690 + 104 = 138000 + 104 = 138104
d. Q= 2100, R = 374; Verification : 2100 × 789 + 374 = 1656900 + 374 = 1657274
e. Q = 3002, R = 625; Verification : 3002 × 945 + 625 = 2836890 + 625 = 2837515
f. Q = 369, R = 730; Verification : 369 × 4350 + 730 = 1605150 + 730 = 1605880
4. 1001001 5. Quotient = 1437
Practice 2.8
1. ` 125820 2. 6903893 3. 309 days 4. 1766227 valid votes 5. 1308720 pins
6. 7216923 bolts 7. 10000 flowers 8. 3574944 tonnes 9. The other number is 2401. 10. 4369818
Practice 2.9
1. a. Commutative Property b. Additive Identity Property c. Associative Property d. Distributive Property
e. Commutative Property f. Additive Identity Property g. Distributive Property h. Associative Property
2. a. 349 b. 0 c. 0 d. 1835 e. 1234 f. 5712 3. a. 245 b. 270 c. 3105 d. 0 e. 1 f. 0
Practice 2.10
1. 2.
Actual Sum Estimated Sum Actual Sum Estimated Sum
a. 92 90 a. 776 800
b. 39 40 b. 1213 1200
c. 1292 1290 c. 10026 10000
d. 416 420 d. 7747 7700

3. Actual Sum Estimated Sum 4. Actual Sum Estimated Sum
a. 164576 165000 a. 44 40
b. 179569 180000 b. 437 440
c. 107267 107000 c. 416 420
d. 3114 3110

Mathematics-5 215