Odpowiedź :
Odpowiedź:
a) 5*5/9= 25/9= 2 i 7/9
b) 3*3/5= 9/5= 1 i 4/5
c) 3*5/6 ( skracamy 3 i 6 przez 3) = 5/2= 2 i 1/2
d) 12*2/5= 24/5= 4 i 4/5
e) 9/10*8 ( skracamy 10 i 8 przez 2)= 9/5*4 = 36/5= 7 i 1/5
f) 3/4 *17= 51/4= 12 i 3/4
Szczegółowe wyjaśnienie:
[tex]a)[/tex] [tex]5 * \frac{5}{9} = \frac{5}{1} * \frac{5}{9} = \frac{25}{9}[/tex] [tex]( 2\frac{7}{9} )[/tex]
[tex]b)[/tex] [tex]3 * \frac{3}{5} = \frac{3}{1} * \frac{3}{5} = \frac{9}{5}[/tex] [tex]( 1\frac{4}{5} )[/tex]
[tex]c)[/tex] [tex]3 * \frac{5}{6} = \frac{3}{1} * \frac{5}{6} = \frac{15}{6} = \frac{5}{2}[/tex] [tex]( 2\frac{1}{2} )[/tex]
[tex]d)[/tex] [tex]12 * \frac{2}{5} = \frac{12}{1} * \frac{2}{5} = \frac{24}{5}[/tex] [tex]( 4\frac{4}{5} )[/tex]
[tex]e)[/tex] [tex]\frac{9}{10} * 8 = \frac{9}{10} * \frac{8}{1} = \frac{72}{10} = \frac{36}{5}[/tex] [tex]( 7\frac{1}{5} )[/tex]
[tex]f)[/tex] [tex]\frac{3}{4} * 17 = \frac{3}{4} * \frac{17}{1} = \frac{51}{4}[/tex] [tex]( 12\frac{3}{4} )[/tex]