优质解答
1.3/7 × 49/9 - 4/3 2.8/9 × 15/36 + 1/27 3.12× 5/6 – 2/9 ×3 4.8× 5/4 + 1/4 5.6÷ 3/8 – 3/8 ÷6 6.4/7 × 5/9 + 3/7 × 5/97.5/2 -（ 3/2 + 4/5 ）8.7/8 + （ 1/8 + 1/9 ）9.9 × 5/6 + 5/6 10.3/4 × 8/...
1.3/7 × 49/9 - 4/3 2.8/9 × 15/36 + 1/27 3.12× 5/6 – 2/9 ×3 4.8× 5/4 + 1/4 5.6÷ 3/8 – 3/8 ÷6 6.4/7 × 5/9 + 3/7 × 5/97.5/2 -（ 3/2 + 4/5 ）8.7/8 + （ 1/8 + 1/9 ）9.9 × 5/6 + 5/6 10.3/4 × 8/...