Răspuns:
5.a) 1/6+1/4=2*1/6+3*1/4=2/12+3/12=5/12
b) 13/21+13/14=2*13/21+3*13/14=26/42+39/42=65/42
C)4/15+1/20=4*4/15+3*1/20=16/60+3/60=19/60
e)=5*11/14+2*3/35=55/70+6/70=61/70
f)=3*1/8+2*7/12=3/24+14/24=17/24
g)=2*5/33+3*1/22=10/66+3/66=13/66
6.a)=10*1/10+3/100=10/100+3/100=13/100
b)=3/10+5*7/2=3/10+35/10=38/10
c)=25/100+25*1/4=25/100+25/100=50/100
e)=11/14+23/14=32/14
f)=2*1/8+15/16=2/16+15/16=17/16
g)=2*3/5+5*1/2=6/10+5/10=11/10
Explicație pas cu pas:
n*(amplificare fractie cu numarul n)
De la punctul e de la 5 nu am mai scris forma exercitiului initial.
