1) 0,7=7/10, 0,07=7/100, 0,707=707/1000, 0,700=7/10, 0,7070=7070/10000=707/1000, 0,070=70/1000=7/100
2) 2,300=2,3=23/10=2 3/10, 2,03=203/100=2 3/100, 2,303=2303/1000=2 303/1000, 2,3=23/10=2 3/10, 2,3030=2,303=2303/1000=2 303/1000, 2,030=2,03=203/100=2 3/100