甲、乙兩數(shù)互為倒數(shù),將乙數(shù)的小數(shù)點向右移兩位是250,甲數(shù)是________.
0.4
分析:根據(jù)題干“乙數(shù)的小數(shù)點向右移兩位是250”則可得乙數(shù)是2.5,因為互為倒數(shù)的兩個數(shù)的乘積是1,由此即可求出甲數(shù).
解答:根據(jù)題干分析可得,乙數(shù)是2.5,
1÷2.5=0.4,
答:甲數(shù)是0.4.
故答案為:0.4.
點評:此題考查了小數(shù)點移動引起小數(shù)大小的變化規(guī)律以及互為倒數(shù)的意義的靈活應用.