a)
[tex]\frac{3}{8} *4 = \frac{3*4}{8} = \frac{3*1}{2} = \frac{3}{2} [/tex]
b)
[tex]8*\frac{1}{6} = \frac{8*1}{6} = \frac{4*1}{3} = \frac{4}{3} [/tex]
c)
[tex]\frac{3}{20} *5 = \frac{3*5}{20} = \frac{3*1}{4} = \frac{3}{4} [/tex]
d)
[tex]\frac{4}{7} *7 = \frac{4*7}{7} = \frac{4*1}{1} = 4[/tex]
e)
[tex]3*\frac{4}{15} = \frac{3*4}{15} = \frac{1*4}{5} = \frac{4}{5} [/tex]
Myślę że pomogłem ;)
