Răspuns
Explicație pas cu pas:
1) 7 / 9 + 4 / 9 - 3 / 9 × 2 / 3 =
= 11 / 9 - 6 / 27 =
= 11 / 9 - 2 / 9 =
= 9 / 9 =
= 1
__________
3 / 5 + ( 5/ 2 ) × ( 2 / 25) =
= 3 / 5 + ( 5 / 25 ) × ( 2 / 2 ) =
= 3 / 5 + 1 / 5 =
= 4 / 5
____________________
2 / 3 + 6 / 2 × 2 / 3 - 2 / 18 : 4 / 3 =
= 2 / 3 + 2 - 1 / 9 × 3 / 4 =
= 2 / 3 + 2 - 1 / 12 = → le aduc la acelasi numitor comun 12
= 8 / 12 + 24 / 12 - 1 / 12 =
= 32 / 12 - 1 / 12 =
= 31 / 12 =
= 2 intregi si 7 / 12
