51又2/3×3/5+71又3/4÷7/4+91又4/5×5/9
问题描述:
51又2/3×3/5+71又3/4÷7/4+91又4/5×5/9
答
113
答
51又2/3×3/5+71又3/4÷7/4+91又4/5×5/9
=(50+5/3)×3/5+(70+7/4)×4/7+(90+9/5)×5/9
=30+1+40+1+50+1
=123