Revision on four operations and Ratio

Find the highest difference in the profit between any two days.

Find the difference in heights below sea level between the highest and the lowest.

-350 m - 420 m 800 m 280 m 550 m

David took 3 hrs 25 mins to travel from Singapore to Australia.

Australia is ahead of Singapore by 2 hours.

He left Singapore at 6 pm.

Find the time in Australia when he reaches there.

Simply the following ratio

2.4 : 0.8

Simply the following ratio

1.8 kg : 600 g