化成最简单的整数比:50:15:3:0.25:0.125:0.50.8:9645分钟:小时0.34吨:170千克.
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解:(1)50:15,
=(50÷5):(15÷5),
=10:3;
(2):3,
=():(3×5),
=2:15;
(3),
=():(0.25×8),
=1:2;
(4),
=():(),
=4:5;
(5)0.125:0.5,
=(0.125×8):(0.5×8),
=1:4;
(6)0.8:96,
=(0.8÷0.8):(96÷0.8),
=1:120;
(7)45分钟:小时,
=45分钟:40分钟,
=(45÷5):(40÷5),
=9:8;
(8)0.34吨:170千克,
=340千克:170千克,
=(340÷170):(170÷170),
=2:1.
解析分析:根据比的基本性质作答,即在比的前项和后项同时乘或除以一个数(0除外)比值不变;据此解答即可.
点评:注意化简比的结果是一个比,它的前项和后项都是整数,并且是互质数.