Answer:
A) D: 4.6
B) C: 5.12
Step-by-step explanation:
A) From the given options, the smallest number is 4.6 which is option D.
Due to the fact that the decimal sides from options A to the last are; 602, 620, 666..., 600.
This is because after the number 6, the remaining digits are assumed to be zero because there is no number attached again. The one that has 6 with dot above it means that it is a recurring decimal with 6. Thus, it can't be the smallest.
B) The largest is option C which is 5.12.
Because on the decimal sides, ranking from highest to lowest we have;
120, 111..., 102, 100. A number with dot on it means recurring decimal.
. On the other hand, 
. Then: