5.5-4/35×2.5-5/7 怎么算
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5.5-4/35×2.5-5/7 怎么算
5.5-4/35×2.5-5/7 怎么算
5.5-4/35×2.5-5/7 怎么算
5.5-4/35×2.5-5/7
=5.5-4/35×5/2-5/7
=5.5-2/7-7/5
=5.5-(2/7+7/5)
=5.5-59/35
=11/2-59/35
=267/70