2. Sydney time: +2 hours
London time: -8 o'clock
3.
(1) is 5m, and 8m to the west is-8m.
(2) 1.5m, and -3m.
(3) 197 grams is -3 grams.
4. From left to right -7, -4,-1, 3 and 6
5. Mount Everest is 8844.43 meters above sea level, and Turpan Basin is-155 meters above sea level.