17分之5除以1又2分之1加3分之1除以3又5分之2
=5/17*(2/3+1/3)
=5/17
5分之4乘以7.7加3.3乘以0.8减80%
=4/5*(7.7+3.3-1)
=4/5*10
=8
如果对你有帮助,请采纳.谢谢!
要采纳先回答的正确答案.是对答题者劳动的尊重.
17分之5除以1又2分之1加3分之1除以3又5分之2
=5/17*(2/3+1/3)
=5/17
5分之4乘以7.7加3.3乘以0.8减80%
=4/5*(7.7+3.3-1)
=4/5*10
=8
如果对你有帮助,请采纳.谢谢!
要采纳先回答的正确答案.是对答题者劳动的尊重.