3 Calculează, respectând ordinea operațiilor:
a) 99:(101-90)
1 000 - (72:3+452)
(107 + 13) -(87 +9)
310 + 188 x (954:9:2)
(270 x 4 + 139 x 3) - 5 x 178
100 x ( 22 x 2:4 - 4:4)
800 - (46:2 x 10 + 70)

b) [(75 + 5) x 9 - 20] : 100
401 - 2x [(107 + 123) -(104 +8)]
586 +5 x [138 + 936:(321 - 317)]
[(3 x 167 - 3) x 153)] - (450 x2 +12)
416 x 4 - 518:[(38 x 0 + 200):100]
729 + 3 000 : 100 x (76+ (893 -890)]
[(6 251 - 4999) x 8 + 600:15] ×0

plsss dau coroanaa​