0.7×13/11-6.6×3/7-2.2÷7/3+0.7×9/11+3.3×8/7
=0.7×13/11+0.7×9/11-6.6×3/7+3.3×8/7-2.2÷7/3
=0.7（13/11+9/11）-3/7（-6.6+8.8）-2.2×3/7
=0.7×2+2.2×3/7-2.2×3/7
=1.4