把除數(shù)變成整數(shù),使各式的商不變,請在橫線里填上合適的數(shù)
(1)21÷0.7=______÷______=______
(2)3÷0.15=______÷______=______
(3)0.36÷4.8=______÷______=______
(4)7.8÷0.3=______÷______=______
(5)1.2÷0.125=______÷______=______.
解:(1)21÷0.7=210÷7=30;
(2)3÷0.15=300÷15=20;
(3)0.36÷4.8=3.6÷48=0.075;
(4)7.8÷0.3=78÷3=26;
(5)1.2÷0.125=1200÷125=9.6.
故答案為:210,7,30;300,15,20;3.6,48,0.075;78,3,26;1200,125,9.6.
分析:在除法算式中被除數(shù)和除數(shù)同時擴(kuò)大或縮小相同的倍數(shù)(0除外),商不變;據(jù)此解答即可.
點評:此題考查了商不變性質(zhì)的靈活運用.