19. Alfabet... matematic": a) (9x9-6x6-a) + (13+ 28: 4) = 5 x 10 + 3; b) (99-b-3 x 8) + 2 x 6:2 = 8 x 2 + 5 x 10; c) (6 x 4:3+ c) : 7 = 16:4; d) (9x4:6x d) - 5 x 5 = 45:9; e) (e-5 x 6 + 10 × 5) : 5 + 4x8 = 42; f) (96-3 x 4-5 x 8) + f-9x7 = 13; g) (23-6x 3+ g) + 3 x 9-8 × 3:6 = 34; (3x9+9: h)+5x4:2-(12-4 × 2) = 6 x 6; (47 +7): i = 28: 4+42:6-35: 7; (6 x 5+ 4xj-8): 6 = 28:4; (k) (8 x 8-32 - 12: k) - (40 - 2 × 10) = 3 × 3; 1)X(95-9 × 5-9 × 1): 8 = 9 × 4 - 8 × 4;
Repede va rog dau coroană ​