7)11.269+5.427-7.169-6.527 8)34.8-15.39+27.5-47.91 9)-0.037+1/4+7/8+5/16-1.4 10)0.4-1/2+0.75-5/6+0.85-2/3

7) 11.269+ 5.427- 7.169 - 6.527
     16.696- 13.696
        3
8) 34.8- 15.39 + 27.5 - 47.91 
     62.3- 63.3
      -1 

7)11.269+5.427-7.169-6.527=3
8)34.8-15.39+27.5-47.91=-1
9)-0.037+1/4+7/8+5/16-1.4=1/2000
10)0.4-1/2+0.75-5/6+0.85-2/3=0