题目内容

(2008?门头沟区)
126+574=
700
700
450-60=
390
390
48×5=
240
240
420÷14=
30
30
0.8÷0.2=
4
4
3.14+1.86=
5
5
6.7-3.8=
2.9
2.9
101×25=
2525
2525
2.5×8=
20
20
2
3
+
1
3
=
1
1
3
4
÷
3
8
=
2
2
2
7
+
3
4
+
5
7
=
1
3
4
1
3
4
1
2
-
1
3
=
1
6
1
6
1-
7
9
=
2
9
2
9
7
8
×
1
7
=
1
8
1
8
3-
1
8
-
7
8
=
2
2
16×
5
8
=
10
10
3
5
÷
4
5
=
3
4
3
4
5
8
÷
2
3
=
15
16
15
16
3
4
-
4
3
=
0
0
分析:根据整数、分数、小数的加减乘除计算的方法进行计算,能简算的要简算.
解答:解:
126+574=700; 450-60=390; 48×5=240; 420÷14=30;
0.8÷0.2=4; 3.14+1.86=5; 6.7-3.8=2.9; 101×25=2525;
2.5×8=20;
2
3
+
1
3
=1;
3
4
÷
3
8
=2;
2
7
+
3
4
+
5
7
=1
3
4
1
2
-
1
3
=
1
6
1-
7
9
=
2
9
7
8
×
1
7
=
1
8
3-
1
8
-
7
8
=2;
16×
5
8
=10;
3
5
÷
4
5
=
3
4
5
8
÷
2
3
=
15
16
3
4
-
4
3
=0.
故答案为:700,390,240,30,4,5,2.9,2525,20,1,2,1
3
4
1
6
2
9
1
8
,2,10,
3
4
15
16
,0.
点评:计算时,要灵活运用所学的知识,快速准确的进行计算.
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