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Calculeaza pe caiet,respectand ordinea efectuarii operatiilo: 459+51×32-21×3:9+6; 990+10×35-42:3×28; 6×145+868:7:2+40-972.

Răspuns :

990 + 10×35 - 42 : 3 × 28 =

990 + 350 - 392 =

= 948


459 + 51 × 32 - 21 × 3 :9 + 6 = 

459 + 1632 - 7 + 6 =

= 2090

6 × 145 + 868 : 7 : 2 + 40 - 972 =

870 + 62 + 40 - 972 = 

= 0
459+1632-7+6=2090
990+350-392=948
870+62+40-972=0