Calculează:
a) 135:5+ [(21 + 8 - 3 x 7) x 4 - 15:5 x 4] =
820:4 - [(45: 9+8 3) x3 - 28:4x2] =
b) 812:4 - [10 x 9: (4 + 3 × 11 + 48: 6) +9] =
905:5+ [ 12 x 8 - (3 + 2 x 15 - 32:8) - 7] =​
Sunt 4