问题
填空题
50千克增加______%是60千克,______千克减少20%是40千克.
答案
(60-50)÷50,
=10÷50,
=0.2,
=20%;
40÷(1-20%),
=40÷0.8,
=50.
故答案为:20%,50.
50千克增加______%是60千克,______千克减少20%是40千克.
(60-50)÷50,
=10÷50,
=0.2,
=20%;
40÷(1-20%),
=40÷0.8,
=50.
故答案为:20%,50.