题目内容

(2011?宜良县模拟)
看谁算得快.
1
6
×
3
2
=
3
5
÷
3
10
=
3
4
×8=
1
2
+
1
3
=
18×2%= 1-
1
2
=
3.5÷18= 137-63-37=
205-199+95= 8.8+1.2= 8π≈ 0.33=
分析:(1)(2)(3)(4)(5)(6)依据分数四则运算计算方法解答,
(7)(8)(9)(10),依据整数和小数四则运算计算方法解答,
(11)把π看作3解答,
(12)依据求一个数的立方计算方法解答.
解答:解:
1
6
×
3
2
=0.25;       
3
5
÷
3
10
=2;           
3
4
×8=6;          
1
2
+
1
3
=
5
6

18×2%=0.36              1-
1
2
=0.5;            3.5÷18=
7
36
;        137-63-37=37;
205-199+95=101;         8.8+1.2=10;           8π≈24;           0.33=0.027.
故答案依次为:0.25,2,6,
5
6
,0.36,0.5,
7
36
,37,101,10,24,0.027.
点评:本题主要考查学生运用四则运算计算方法的能力.
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