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Calculează, respectând regulile învățate. a. (8+9) x (80-69) b. 100: 10 x (7+3) c. (7-7)x9+5x5x5 d. 89-35:(5+2)+43 e. (45 + 25-34):(56:8-1) f.7x4+ (87-79) x (36:4) g-47+5x (32-25)-8x7 h. 36:4x (63:9+6x7)-42:6 i. (4x3+5x4): (6x8-5x8) j. (87+6x19+45:3)-(50×2+43×2)​