题目内容
先找出规律,再按规律填数.
(1)1,1.1,1.3,1.6,
(2)3,1.5,0.75,0.375,
(1)1,1.1,1.3,1.6,
2
2
,2.5
2.5
,3.1.(2)3,1.5,0.75,0.375,
0.1875
0.1875
,0.09375
0.09375
.分析:(1)1.1-1=0.1,1.3-1.1=0.2,1.6-1.3=0.3…
相邻两个数的差是:0.1,0.2,0.3,依次增加0.1;
(2)3÷1.5=2,1.5÷0.75=2,0.75÷0.375=2,前一个数是后一个数的2倍,由此求解.
相邻两个数的差是:0.1,0.2,0.3,依次增加0.1;
(2)3÷1.5=2,1.5÷0.75=2,0.75÷0.375=2,前一个数是后一个数的2倍,由此求解.
解答:解:(1)1.6+(0.3+0.1),
=1.6+0.4,
=2;
2+(0.4+0.1),
=2+0.5,
=2.5;
(2)0.375÷2=0.1875;
0.1875÷2=0.09375;
故答案为:2,2.5;0.1875,0.09375.
=1.6+0.4,
=2;
2+(0.4+0.1),
=2+0.5,
=2.5;
(2)0.375÷2=0.1875;
0.1875÷2=0.09375;
故答案为:2,2.5;0.1875,0.09375.
点评:解决本题关键是找出相邻两个数的差的变化或者倍比关系,再由此求解.
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