1. Calculează :
f) 2 × [ 2 + 3 × ( 2 la puterea 3 ÷ 2 + 3 × 3 la puterea 2 - 5 la puterea 2 ) ] =

2. a) [ ( 3 la puterea 3 × 2 la puterea 2 + 6 la puterea 2 ) : 2 la puterea 3 - 4 la puterea 2 ] : 2 =

4. a) 45× ÷ 2 b) 12× ÷ 5 si 12× : 2
c) 57× ÷ 2 d) 5| 8××