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8MARIA9BACIU
a fost răspuns

efectueaza respectand ordinea operatiilor:
(500-750:5):7x(90:5)
[(840-840:4):3x4-335]:5
(1000-325):[972:3-90x3);9
30+5x{32:8+5x[40+3x(200:5-72:2)]}
3x{3+6x[9+15x(6+6-3)]}
Va rog repede!!!
Nu am mult timp!!!

Răspuns :

Citivas
1)1 750:5=150 2 500-150=350 3 90:5=18 4 350:7=50 5 50×18=900 2)1 840:4=210 2 840-210=630 3 630:3=210 4 210×4=840 5 840-335=505 6 505:5=101