把除数变成整数,使各式的商不变,请在横线里填上合适的数
(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.
故答案为:210,7,30;300,15,20;3.6,48,0.075;78,3,26;1200,125,9.6.
分析:在除法算式中被除数和除数同时扩大或缩小相同的倍数(0除外),商不变;据此解答即可.
点评:此题考查了商不变性质的灵活运用.