Răspuns
1). 1/4(amplifica cu 3)+7/3(ampl cu4)+1/2(ampl cu 6)=3/12+21/12+6/12=30/12(simpl cu2)=15/6
2). 21/4(ampl cu2)+31/2(ampl cu 4)-11/8=42/8+124/8-11/8=155/8
3). 10/15(simpl cu5)+11/22(simpl cu 11)=2/3(ampl cu 2)+1/2(ampl cu 3)=4/6+3/6=7/6
4).11/22+11/33+11/44(simpl toate cu 11)=1/2(ampl cu 6)+1/3(ampl cu 4)+1/4(ampl cu3)=6/12+4/12+3/12=13/12
5). 1/5(ampl cu 6)+1/10(ampl cu 3)+1/30=6/30+3/30+1/30=10/30(simpl cu 10)=1/3
Explicație pas cu pas: