Răspuns:
Explicație pas cu pas:
b) 15+3(1/4+17/16)=15+3(4+17)/16=15+3·21/16=15+61/16=15+3 13/16=18 13/16
e) (2·3/5)(1/23-1/46)=6/5·(2-1)/46=3/(5·13)=3/65
c) 7(2/5+3-12/5)=7·(2+3·5-12)/5=7(17-12)/5=7·5/5=7
f) 5(7/11+3/22-1/2)=5(2·7+3-11)/22=5(14+3-11)/22=5·6/22=15/11
