ex.4 va rog frumos!!

Răspuns:
a. 16/5×35/4= 28.
b. 9/7×28/15= 12/5= 2 intregi 2/5
c.45/8×32/25= 36/5= 7 intregi si 1/5
d. 42/13×39/14= 9.
Explicație pas cu pas:
a) 16/5•35/4=4•7=28
b) 9/7•28/15=3•4/5=12/5=2⅖
c) 45/8•32/25=9•4/5=36/5=7⅕
d) 42/13•39/14=3•3=9