Module 1: The International System of Units (SI)
SC 6. Since 1 m = 0.001 km, multiply 6750 m by 0.001 or 10–3.
SC 7. Since 1 km = 1000 m, multiply 0.3 km by 1000 or 103.
SC 8. Because stamps are small in size, expressing their dimensions in mm avoids decimals. For example, a regular stamp on a letter is about 24 mm long and 20 mm wide.
SC 9. First, find the thickness of 500 sheets of paper in metres.
Since 1 cm = 0.01 m, multiply 5 cm by 0.01 or 10–2.
Divide by 500 to find the thickness of 1 sheet.
0.05 m ÷ 500 = 0.0001 m.
One sheet is about 0.0001 m, or 10–4 m, thick.
SC 10. Since 1 m = 100 cm, multiply 2.4 m by 100 or 102.
SC 11. Since 1 mm = 0.1 cm, multiply 216 mm by 0.1 or 10–1.
Since 1 mm = 0.1 cm, multiply 279 mm by 0.1 or 10–1.
A letter–size sheet of copy paper is 21.6 cm × 27.9 cm.
SC 12. Since 1 m = 100 cm, multiply 2.4 m by 100 or 102.
Andrey jumped 236 cm to win the Olympic gold medal.
SC 13. Since 1 mm = 0.1 cm, multiply each measurement by 10.
The toy sled is 43 mm × 130 mm × 137 mm.
SC 14. Since 1 cm = 10 mm, multiply 44.5 mm by 0.1 or 10–1.
The harpoon head is 4.45 cm long.
SC 15. First, convert 1.6 km to metres.
Since 1 km = 1000 m, multiply 1.6 km by 1000 or 103.
Since one lap is 200 m, a runner must complete 1600 m ÷ 200 m = 8 laps.