Answers Cont. Page 23 1. 1.7 m, 2a. 12.56 m, 1256 cm, 12560 mm, 2b. 37.68 m, 3768 cm, 37 680 mm, 3a. 12.56 cm, b. 18.84, c. 25.12, d. 31.4, 4. It is a straight line, a. 21.98, b. 7.85, c. 34.54, d. 28.26. Page 24 (Where required answers are rounded to the nearest whole number.) 1. 27, 2. 9, 3. 12430 kg or 12.43 tonnes, 4a. 10, b. 267, c. 118, 5. 23, 7. answers will vary.
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Page 28 1a. 30, b. 31, 2a. 11 weeks, b. 33 weeks, 3a. 79 days, b. 250 days, 4. answers will vary, 5a. 5 months, b. 6 months, c. 1 month, 6. 168 hours, 7. 624 weeks, 8. 2132 weeks.
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Page 30 1. answers will vary, 2. 19 years, 3. 1903, 11 years, 4. 4 major wars, Vietnam and Korean War, 5. 10 years, 6. 90 years, 7. 30 years, 8a. 1969, b. 19, c. 66 years, 9. Asian Tsunami. Page 31 1a. 470 sec (or 7 minutes, 50 sec), b. 658 sec (10 minutes, 58 sec), 2a. 750 sec (12 min, 30 sec), b. 19 minutes, 10 sec, 3a. 3 hours, 31 minutes, 5 sec, b. 24 minutes, 11 sec, c. 40 minutes, 7 sec, d. 8 minutes, 26 sec, 4a. 180 sec, b. 630 sec, c. 12600 sec, d. 900 sec, 5a. 285 minutes, b. 59 minutes, c. 28.8 minutes, d. 9.5 minutes, 6a. 25.33 hours, b. 20 hours, c. 14.08 hours, d. 0.35 hours, 7. 1090 sec (18.17 minutes).
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Page 33 1a. 3600 sec, b. 24 hours, c. 7 days, d. 604 800 sec, 2. 31 449 600 sec, 3a. answers will vary, b. answers will vary, c. answers will vary, 4. 36 500 days + 24 leap year days, 5a. 104, b. 730 days, c. 17 520 hours, 6a. 5200 weeks, b. 91 250 days, c. 3 144 960 000 sec, d. answers will vary, 7a. 1 116 000 000 km, b. 26 784 000 000 km, c. 187 488 000 000 km d. 9 749 376 000 000 km.
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