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1÷25=2÷25=3÷25=4÷25=
1÷125=2÷125=3÷125=4÷125=

解:

1÷25=0.04,2÷25=0.08,3÷25=0.12,4÷25=0.16,
1÷125=0.008,2÷125=0.016,3÷125=0.024,4÷125=0.032.

分析:先求出1÷25和1÷125的商,再根据除数不变,被除数扩大几倍,商也扩大几倍进行求解.
点评:本题主要是考查了商的变化规律的灵活运用.
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