481. Efectuează: a) 350-6 x 156: 3 +850: 50; b) 1 000-333x 3+999: 1-777; c) 600: 10: 2+125:5-270:9; d) 237 x 2+ 105 x 3:3+234:9; e) 1 300 + 256 x 15-980: 20 x 40 : 40; f) 810 + 480:6:10 + 270 : 3:90x 10; B)820-392:7x 5+ 1728 :32-594; h) 270+ 149 x 5-520:5-1 780 : 10; i) 1 609-123 x 4:6:1-884x 4:8; j)136 x 28-1 525: 25-149 x 21. va rog ajutatima
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