1. 0.7654, 0.1, 0.09, 0.08 ---- how you do this is that you look for all the numbers that are right after the decimal mark, and compare all the numbers that are similar, to see which one is bigger. Then you continue down the line to two marks after the decimal, and see which number is bigger.
2. 89.09, 3.88, 1.786, 0.875, 0.342
3. 0.7, 0.07, 0.0071, 0.007, 0.000007
4. 0.965, 0.873, 0.321, 0.0009876