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0.1
0.1
÷0.5=0.2      0.36÷
0.4
0.4
=0.9.
分析:(1)我们运用0.2乘以0.5就是我们要求的被除数是多少.
(2)我们运用0.36除以0.9就是要求的除数是多少.
解答:解:(1)0.2×0.5=0.1;
(2)0.36÷0.9=0.4;
故答案为:0.1,0.4.
点评:我们运用“商×除数=被除数”“被除数÷商=除数”进行解答即可.
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