下列算式中,除數(shù)變成整數(shù)后,被除數(shù)應該是多少?
330÷5.08=________÷508
0.2304÷0.64=________÷64
1.05÷9.7=________÷97
5÷0.168=________÷168.
33000 23.04 10.5 5000
分析:①330÷5.08=( 。508,由式子可知,除數(shù)擴大100,被除數(shù)也要擴大100倍.所以被除數(shù)是33000;
②0.2304÷0.64=( 。64由式子可知,除數(shù)擴大100,被除數(shù)也要擴大100倍.所以被除數(shù)是23.04;
③1.05÷9.7=( 。97 由式子可知,除數(shù)擴大10,被除數(shù)也要擴大10倍.所以被除數(shù)是10.5;
④5÷0.168=( )÷168由式子可知,除數(shù)擴大1000,被除數(shù)也要擴大1000倍.所以被除數(shù)是5000.
解答:330÷5.08=33000÷508,
0.2304÷0.64=23.04÷64,
1.05÷9.7=10.5÷97,
5÷0.168=5000÷168.
故答案為:33000,23.04,10.5,5000.
點評:本題考查了商不變的性質(zhì)即,被除數(shù)與除數(shù)同時擴大或縮小相同的倍數(shù)(0除外)商不變.