1) 8 5/9-(4 2/9+2 1/6)=2)( 18 7/12 + 3 1/5) -

1) 8 5/9-(4 2/9+2 1/6)=8 5/9-4 2/9-2 1/6=4 3/9-2 1/6=4 1/3-2 1/6=
= 4 2/6-2  1/6=2 1/6

2)( 18 7/12 + 3 1/5) - 7 5/12=18 7/12 + 3 1/5 - 7 5/12=11 2/12+ 3 1/5=
=11 1/6+ 3 1/5=11 5/30+3 6/30=14 11/30

3)3 5/16+ 1/4- 2 1/16=1 4/16+1/4=1 1/4+1/4=1 2/4=1 1/2

4)3 7/9 - 1 5/18 + 3 1/2=3 14/18-1 5/18+3 9/18=5 18/18=6

5)(6,6:6-8,0125+2/15*0,03)*2,75=(1,1-8,0125+0,06/15)*2,75=
=(-6,9125+0,004)*2,75=-6,9085*2,75=-18,998375

6)(70,4*51,6-3541,84)* (603,48:56,4)*889,75=
=(3632,64-3541,84)* (603,48:56,4)*889,75=90,8* 10,7*889,75=
=864445,51