2. (5/18- (-11/27)):(-2 5/16)=8/27
1) 5/18- (-11/27)=5/18+11/27=15/54+22/54=37/54
2)37/54: (-2 5/16)=37/54:(-37/16)=37/54*(-16/37)=8/27
3. (-4 7/10-1 2/15): (-4 29/54) =1 2/7
1)-4 7/10-1 2/15=-4 21/30 - 1 4/30=-5 25/30
2)-5 25/30:(-4 29/54)=-175/30:(-245/54)=175/30*54/245=9/7=1 2/7
4.(17/24-19/30):(-5/36+22/45)=3/14
1)17/24-19/30=85/120-76/120=9/120
2)-5/36+22/45=22/45-5/36=88/180-25/180=63/180
3)9/120:63/180=9/120*180/63=3/14
5. -4 5/6+3 3/23*(-11 4/9-(-3,6):9/35)=3 1/6
1) -3,6:9/35=-36/10:9/35=-36/10*35/9=-14
2)-11 4/9-(-14)=-11 4/9+14=14-11 4/9=13 9/9-11 4/9=2 5/9
3)3 3/23*2 5/9=72/23*23/9=8
4) -4 5/6+8=8-4 5/6=7 6/6-4 5/6=3 1/6