a)
[tex]2:0,4 = 20:4 = 5\\\\0,64:0,2 = 64:20 = 3,2\\\\0,28:0,07 = 28:7 = 4\\\\5,4:0,09 = 540:9 = 60[/tex]
b)
[tex]0,15:0,03 = 15:3=5\\\\36:0,6 = 360:6 = 60\\\\0,9:0,003 = 900:3 = 300\\\\2,1:0,007 = 2100:7 = 300[/tex]
