题目内容

(2012?资中县模拟)
直接写出下面各题的结果.
127+38=
1.02-0.43= 8.8÷0.2= 2-1
6
7
=
7
11
×1
4
7
=
1÷7+
6
7
=
1-1×
1
3
=
5
6
+
3
4
=
9
10
÷
3
20
=
14÷
7
8
=
0.23×4= 5×3.14=
700×0.01%=
5
6
×
2
15
=
1
4
÷25%×
1
8
=
1
3
×2÷
1
3
×2=
分析:依据四则运算计算方法,先算第二级运算,再算第一级运算,如果只含有同一级运算,按照从左到右顺序计算,有括号先算括号里面的解答.
解答:
解:127+38=165; 1.02-0.43=0.59; 8.8÷0.2=44; 2-1
6
7
=
1
7
7
11
×1
4
7
=1;
1÷7+
6
7
=1;
1-1×
1
3
=
2
3
5
6
+
3
4
=1
7
12
9
10
÷
3
20
=6;
14÷
7
8
=16;
0.23×4=0.032; 5×3.14=15.7;
700×0.01%=0.07;
5
6
×
2
15
=
1
9
1
4
÷25%×
1
8
=0.125;
1
3
×2÷
1
3
×2=4.
故答案依次为:165,0.59,44,
1
7
,1,1,
2
3
,1
7
12
,6,16,0.032,15.7,0.07,
1
9
,0.125,4.
点评:本题主要考查学生对于四则运算计算方法掌握,解答时保证计算的准确性.
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