(9-1 1/3*4 2/7)*21/46
(1,75+2 1/3):(6,5-2/3
(5-1 1/3*1 1/6)*27/31
(4,1-2 3/4):(1 16/21+4 2/3)

0,12-1,375 1,325-2,41 1 2/3-(-0,75) 0,25-(-2 1/6)
-4,2-3,25-(-1/12) -2,4-1,75-(-5/12)
Очень нужно. Спасибо

(9-4/3*30/7)*21/46=(9-40/7)*21/46=(18/2-40/7)*21/46=(126/14-80/14)*21/46=46/14*21/46=3/2=1 1/2(7/3+7/3)/(13/2-2/3)=(14/3):(39/6-4/6)=14/3:35/6=14/3*6/35=28/35(5-4/3*7/6)*27/31=(5-28/18)*27/31=(5-14/9)*27/31=(15/3-14/9)*27/31=(45/9-14/9)*27/31=31/9*27/9=3