o,9:+-= (1:0,3-2)-= 2*1,6*2= 2::3,4= +0,3+(0,8-=
1. =9/10: 1/5+1/3-3/5= 9/2+1/3-3/5=27/6+2/6-3/5=29/6-3/5=145/30-18/30=127/30=4 7/30
2. =(1*10/3-7/3)-5/6=3/3-5/6=6/6-5/6=1/6
3. =15/7*16/10*7/3=8/2=4
4. =28/11*11/7*10/34=40/34=1 3/17
5. =2/5+3/10+(8/10-1/2)=4/10+3/10+(8/10-5/10)=8/10+3/10=11/10= 1 1/10
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1. =9/10: 1/5+1/3-3/5= 9/2+1/3-3/5=27/6+2/6-3/5=29/6-3/5=145/30-18/30=127/30=4 7/30
2. =(1*10/3-7/3)-5/6=3/3-5/6=6/6-5/6=1/6
3. =15/7*16/10*7/3=8/2=4
4. =28/11*11/7*10/34=40/34=1 3/17
5. =2/5+3/10+(8/10-1/2)=4/10+3/10+(8/10-5/10)=8/10+3/10=11/10= 1 1/10