2/3×[（3/4—1/6）÷1/5] [16/5—（3/4＋3/2）]×10/9 =2/3×[7/12 ×5] [16/5—10/4]×10/9 =(2/3×35/12) ×(7/10×10/9) =35/18×7/9 =245/162 望采纳,若不懂,请追问.
