1)
-10<3 и 1,1<5<br>-10+1,1<3+5<br>-8,9<9<br>2)
4/15<4,5 и 3<3,2<br>4/15+3<4,5+3,2<br>3 4/15<7,7<br>3 4/15<7 7/10<br>3)
9,8>0,7 и 8 1/3>-1/7
9,8+8 1/3>0,7-1/7
9 4/5+8 1/3>7/10-1/7
9 12/15+8 5/15>49/70-10/70
17 17/15>39/70
18 2/15>39/70
4)
-6 9/13>-11 2/3 и 4 1/3>69/70
-6 9/13+4 1/3>-11 2/3+69/70
-6 27/39+4 13/39>-11 140/210+207/210
-2 14/39>-10 350/210+207/210
-2 14/39>-10 143/210