Explicație pas cu pas:
a) (3-1/3) × (9/8)²=
(9/3-1/3) × (9²/8²)=
(8/3) × (81/64)=
648/192=
27/8
b) 3/4 : (3/4-1/2) - 4/9 =
3/4 : [(3-2)/4] - 4/9 =
3/4 : (1/4) - 4/9 =
3/4 × 4 - 4/9 =
3 - 4/9 =
27/9 - 4/9 =
23/9
