Odpowiedź:
a)
5/9 x 5/9= 25/81
b)
3/4 × (-2/7)= -3/4*2/7=-3/2*1/7=-3/14
c)
5/13 × 2 i 9/15= 5/13*39/15=5*3/15=3/3=1
d)
-14/15 × (-1 i 3/7)=-14/15*(-10/7)=14/15*10/7=2/15*10=2/3*2=4/3=1 1/3
Szczegółowe wyjaśnienie:
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Odpowiedź:
a)
5/9 x 5/9= 25/81
b)
3/4 × (-2/7)= -3/4*2/7=-3/2*1/7=-3/14
c)
5/13 × 2 i 9/15= 5/13*39/15=5*3/15=3/3=1
d)
-14/15 × (-1 i 3/7)=-14/15*(-10/7)=14/15*10/7=2/15*10=2/3*2=4/3=1 1/3
Szczegółowe wyjaśnienie: