Page 377 - Start Up Mathematics_8 (Non CCE)

Review Exercises Try It Out!
Multiple Choice Questions 9
1. c 2. b 3. c 4. b Exercise 2.2
5. c 6. d 1. (a) 1 (b) 1 (c) 16 (d) 125
Solve Mentally 9 625 8
True or False 2. (a) 5 (b) –1 (c) 2
1. True 2. False 3. False 4. False 5. True 3 4 3

Fill in the Blanks 3. (a) 1 (b) 5 (c) 3 (d) 3
1. additive inverse 2. rational number 400 6 2 20
3. a negative rational 4. not 5. 3; 4 Ê 1ˆ 3 Ê 2ˆ 6
4. (a) Á ˜ (b) Á ˜ (c) 1
Answer in One Word or a Line Ë 4¯ Ë 3¯
1. Absolute value of a rational number is its numerical value Ê 1ˆ –4 Ê 9ˆ –6 Ê 2ˆ –6 Ê 3ˆ –6
with no regards to its sign. 5. (a) Á ˜ (b) Á ˜ (c) Á ˜ (d) Á ˜
4¯
4¯
Ë
Ë
7¯
Ë
Ë
3¯
2. Yes 3. Infinite 4. Zero 3 12 6
1
3ˆ
3ˆ
Let’s Evaluate 6. (a) Ê Á ˜ (b) (5) 6 (c) Ê Á ˜ (d) ʈ
Á˜
˯
Ë
Ë
4¯
7¯
8
11 16 - 2
1. (a) (b) (c) 64 289 1 27
78 7 3 7. (a) 21 (b) 36 (c) 81 (d) 4
3 5 47 11
3. 4. 5. (a) (b) (e) –5 (f) 486
14 63 12 24
- 1 - 16 243 9
19 3 - 3 - 1 1 3 8. 9. 10. 11.
7. 8. 10. , , 0, , 2 81 4 25
11 4 8 4 4 8
12. (a) x = 3 (b) x = 13 (c) x = 3
Thinking Skills 4,096 Ê 2ˆ 12 64 Ê 2ˆ 6
Ë
1 Distance 13. (a) or Á ˜ (b) 729 or Á ˜
3¯
3¯
Ë
1. 269 km, 280 km (Hint: Speed = ) 5,31,441
3 Time
1 ʈ 6
1
22 14. or
2. 140 3. Perimeter of square and by m 46,656 Á˜
˯
6
15
Exemplar Problems 15. (a) m = 1 (b) m = –1 (c) m = –3
1. d 2. a 3. Positive 4. True Try It Out!
1 - 1 1. 5 2. (xy) –1
5. False 6. 28 7. and 8. 39 cm
5 5
Exercise 2.3
–7
2
Chapter 2 1. (a) 3.75 × 10 (b) 5.06289 × 10 (c) 9.28 × 10 12
(d) 3 × 10 –8 (e) 4.603 × 10 –2 (f) 4.78 × 10 –1
Exercise 2.1
2. (a) 0.0000000325 (b) 40,830 (c) 0.0000917
–1 16 25 –343 –8
1. (a) (b) (c) (d) (e) (d) 2000100000 (e) 0.000000008 (f) 7,900
8 1 16 27 27
3. Diameter of the sun is approximately 110 times to the
19 diameter of the earth.
2. (a) 5 (b) 1 (c) 13 (d) (e) 44
64
Review Exercises
1 64 5 448
3. (a) 1 (b) (c) (d) (e) Multiple Choice Questions
400 27 6 27
9 - 4 1. d 2. d 3. d 4. b 5. a
(f) (g) (h) 3,125
16 3 Solve Mentally
- 2 –4 True or False
4. 5. 6. 13
5 5 1. True 2. False 3. True 4. False 5. True
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