1/2÷(3/5÷2/3)
=1/2÷9/10
=5/9(小时)
50-50×2/5-2/5
=50-20-2/5
=29又3/5(千克)
甲队8天完成,每天做这项工程的1/8,同理,乙队每天做1/10,丙队每天做1/12
(1-1/12×3)÷(1/8+1/10+1/12)
=3/4÷37/120
=90/37
=2又16/37(天)
2÷(1-1/5)
=2÷4/5
=1又1/2(万千克)或者2.5万千克.
1/2÷(3/5÷2/3)
=1/2÷9/10
=5/9(小时)
50-50×2/5-2/5
=50-20-2/5
=29又3/5(千克)
甲队8天完成,每天做这项工程的1/8,同理,乙队每天做1/10,丙队每天做1/12
(1-1/12×3)÷(1/8+1/10+1/12)
=3/4÷37/120
=90/37
=2又16/37(天)
2÷(1-1/5)
=2÷4/5
=1又1/2(万千克)或者2.5万千克.