1.6÷ 3/8 – 3/8 ÷6 =1/6x(3/8-3/8)=1/6x0=02.4/7 × 5/9 + 3/7 × 5/9 =(4/7+3/7)x5/9=1x5/9=5/93.5/2 -（ 3/2 + 4/5 ）=5/2-3/2-4/5=1-4/5=1/54.6 ×（ 1/2 + 2/3 ）=6x1/2+6x2/3=3+4=75.8 × 4/5 + 8 × 11/5=8...太少