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1.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/4
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1.3/7 × 49/9 - 4/3 =147/63-84/63=63/63=1；2.8/9 × 15/36 + 1/27 =120/324+12/324=132/324=11/27；3.12× 5/6 – 2/9 ×3 =60/6-2/3=10-2/3=30/3-2/3=28/3；4.8× 5/4 + 1/4=40/4+1/4=41/4.《接力出版社七年级暑...
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