Aidez moi svp, merci :)

1/
18/4  x 5/29 = 90/ 116 = 45/ 58 =0.78

2/

(44x10) : (53-34)
440 / 19
23.16

3/

(6x6) + (4x3x5) -(10x3)
36 + 60 -30
66

4/
189/17
1.18

5/
(80/3) x(29x3)
80/3 x87
6960/3
2320