Arrange the following decimal numbers in descending order:

(i) 6.45, 4.65, 6.405, 64.5

(ii) 73.5, 35.7, 7.35, 7.035

If the school bags of Garima and Nakul weigh 5.2 kg and 4.832 kg respectively, find

(i) the total weight

(ii) the difference in weight of the bags

By how much does the sum of 15.453 and 31.647 exceed the sum of 18.47 and 19.506?

Convert 2435 m to km and express the result as mixed fraction.