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计算:51又2/3÷5/3+71又3/4÷7/4+91又4/5÷9/5
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计算:
51又2/3÷5/3+71又3/4÷7/4+91又4/5÷9/5
=(50+5/3)×3/5+(70+7/4)×4/7+(90+9/5)×5/9
=50×3/5+5/3×3/5+70×4/7+7/4×4/7+90×5/9+9/5×5/9
=30+1+40+1+50+1
=123
51又2/3÷5/3+71又3/4÷7/4+91又4/5÷9/5
=(50+5/3)×3/5+(70+7/4)×4/7+(90+9/5)×5/9
=50×3/5+5/3×3/5+70×4/7+7/4×4/7+90×5/9+9/5×5/9
=30+1+40+1+50+1
=123
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