Question

Va rog ajutatima!!!!​

Answer 1

Răspuns:

Explicație pas cu pas:

18)2/3+3/4×8/10=2/3+3/5=10+9/15=19/15

19)6/9+6·6/9=2/3+6·2/3=2+20/3=22/3

20)1·6/9:(3-5/3)=5/3×3/9-5=5/4

22)(1/9+2/9+3/9+4/9)×1/10= 1/9(1+2+3+4)×1/10=10/9×1/10=1/9