Tính
tính
(11/4×-5/9-4/9×11/4)
(17/28+18/29-19/30-21/31)×(-5/12+1/4+1/6)
(7/20+11/15-15/12)÷(11/20-26/45)
17/5×-31/125×1/2×10/17×-1/23
1/9-5/6-4 trên phần7/12-1/36-10
giúp
(11/4×-5/9-4/9×11/4)
(17/28+18/29-19/30-21/31)×(-5/12+1/4+1/6)
(7/20+11/15-15/12)÷(11/20-26/45)
17/5×-31/125×1/2×10/17×-1/23
1/9-5/6-4 trên phần7/12-1/36-10
giúp