分數(shù); 小數(shù); 百分數(shù)
五折=________=________=________
八五折=________=________=________
三成=________=________=________
六五成=________=________=________.
0.5 50%
0.85 85%
0.3 30%
0.65 65%
分析:(1)五折也就是50%,先把百分數(shù)寫成分數(shù)的形式,再根據(jù)分數(shù)的性質化成最簡分數(shù);去掉百分號,把小數(shù)點向左移動兩位即可化為小數(shù);
(2)八五折也就是85%,先把百分數(shù)寫成分數(shù)的形式,再根據(jù)分數(shù)的性質化成最簡分數(shù);去掉百分號,把小數(shù)點向左移動兩位即可化為小數(shù);
(3)三成也就是30%,先把百分數(shù)寫成分數(shù)的形式,再根據(jù)分數(shù)的性質化成最簡分數(shù);去掉百分號,把小數(shù)點向左移動兩位即可化為小數(shù);
(4)六五折也就是65%,先把百分數(shù)寫成分數(shù)的形式,再根據(jù)分數(shù)的性質化成最簡分數(shù);去掉百分號,把小數(shù)點向左移動兩位即可化為小數(shù).
解答:(1)五折=
=0.5=50%;
(2)八五折=
=0.85=85%;
(3)三成=
=0.3=30%;
(4)六五成=
=0.65=65%.
故答案為:
,0.5,50%,
,0.85,85%,
,0.3,30%,
,0.65,65%.
點評:此題考查折數(shù)、成數(shù)、百分數(shù)、分數(shù)與小數(shù)的互化,掌握方法,正確轉化即可.