Page 215 - Start Up Mathematics_4

Scratch Your Brain Exercise 5.6
1. Students to do on their own. (a) 19,995 (b) 9,316 (c) 91,998 (d) 6,32,000
2. (a) 621 – 174 (b) 1326 – 926 (c) 3,146 – 2,143 (e) 2,70,504 (f) 25,51,120 (g) 16,926 (h) 6,970
(d) 2,846 – 1,982 (i) 24,776 (j) 1,13,760 (k) 3,57,204 (l) 92,619
3. ` 1,65,575 4. 50,450 marbles (m) 39,07,200 (n) 54,01,746 (o) 5,55,408 (p) 3,80,422
5. (a) Sunil (b) 490 cm (c) 47 cm (d) 308 cm Exercise 5.7
(e) 411 cm 1. (a) 4,000 (b) 4,000 (c) 7,000 (d) 3,300
(e) 9,600 (f) 19,800 (g) 7,000 (h) 6,400
Assessment Sheet 1
2. (a) 80,000 (b) 3,00,000 (c) 70,000 (d) 5,60,000
I. Choose the correct answer. (e) 6,20,000 (f) 35,20,000 (g) 1,00,000 (h) 2,80,000
1. (b) 2. (a) 3. (c) 4. (d) 5. (d) 6. (b) 7. (a) 8. (b)
II. Solve and answer. Exercise 5.8
1. 6,80,204 2. 58,69,900 1. 1 × 9 + 2 = 11
3. 3,25,597; 3,25,795; 3,26,597; 3,26,795 12 × 9 + 3 = 111
4. 10,99,998 5. 4,08,496 6. 1 7. 141 123 × 9 + 4 = 1111
8. 1,743 9. 25,10,600 10. 6,07,08,234 1234 × 9 + 5 = 11111
12345 × 9 + 6 = 111111
Chapter 5: Multiplication 123456 × 9 + 7 = 1111111
Let’s Recall 1234567 × 9 + 8 = 11111111
1. (a) 156 (b) 2,961 (c) 7,856 (d) 864 (e) 3,104 12345678 × 9 + 9 = 111111111
(f) 6,384 (g) 1,950 (h) 912 2. 238
2. (a) 402 (b) 328 (c) 279 (d) 308 3. (a) 80 (b) 195 (c) 575
3. (a) > (b) = (c) > (d) < 4. 526 × 11 = 5,786 and 4,615 × 11 = 50,765
4. 2,475 5. 200
6. (a) 9 × 3 (b) 9 × 9 (c) 12 × 6 (d) 48 × 2 Exercise 5.9
(e) 9 × 7 (f) 7 × 7 1. 1,125 stickers 2. ` 300 3. 956 students
Note: Answers can vary. 4. ` 25,104 5. 756 pages 6. ` 81,492
7. 22,176 coins 8. 13,480 cookies
Exercise 5.1 9. Students to do on their own.
Students need to do on their own with the guidance of 10. (a) 1,128 (b) 562
teacher.
Exercise 5.10
Exercise 5.2 3 5 5
1. (a)
(a) (ii) (b) (iv) (c) (iii) (d) (i) (e) (iii) 1 0 0 0
3 5 5
Exercise 5.3 8 2 4 4
1. (a) 540 (b) 9,800 (c) 70,000 (d) 23,100 0 1 4 0 0
(e) 4,500 (f) 9,26,000 + 5 1 3 9 0 = 6,390
2. (a) 12,600 (b) 47,400 (c) 51,200 (d) 18,760 6
(e) 29,250 (f) 2,46,000 (g) 20,35,000 (b) 6 6 8
(h) 45,50,000 (i) 2,91,200 5 5 7
9 4 4 2
Exercise 5.4 1 1 1
1. (a) 6,315 (b) 12,084 (c) 13,664 (d) 36,421 1 1 2 2 2 6
(e) 22,185 (f) 39,176 (g) 24,693 (h) 19,612 + 5 + 10
2. (a) 12,480 (b) 49,224 (c) 39,620 (d) 13,132 6 1 1 1 4 5 6 = 61,456
(e) 36,279 (f) 55,272 (g) 8,868 (h) 9,186
(c) 8 4 1
Exercise 5.5 4 3 1 0
(a) 3,268 (b) 3,496 (c) 5,655 (d) 17,018 2 2 6 4
(e) 25,536 (f) 88,388 (g) 2,80,800 (h) 7,54,072 3 1 6 4 8 4 0 6
(i) 1,872 (j) 28,086 (k) 14,652 (l) 81,016 + 7
(m) 1,57,318 (n) 4,48,392 (o) 3,37,025 (p) 3,85,200 8 1 6 8 6 = 38,686

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