题目内容

直接写数对又快
66+8=
3.8+6.2=
4
9
×
3
8
=
47-8= 3.8÷0.19=
12÷
3
7
=
56÷4= 24×0.5= 1-
3
11
=
471-299=
1÷0.25=
3
7
×
5
6
=
600÷5= 8-0.8=
1
3
+
1
6
=
1.06×8×12.5= 1.5×0.6=
1
5
-
1
7
=
6.6+4= 1.5÷0.3=
1
2
÷
3
4
=
1-0.05=
2
9
×4=
2
9
+
2
3
=
6
7
÷3=
1
2
-
1
8
=
2-
4
9
-
5
9
=
5
9
+
1
3
=
1-
1
5
÷
3
5
1+
7
8
÷
7
8
=
分析:本题根据分数,小数,整数的加法、减法、乘法、除法的运算法则计算即可.
471-299可根据凑整法计算;
1.06×8×12.5可根据乘法分配律计算.
解答:
解:66+8=74, 3.8+6.2=10,
4
9
×
3
8
=
1
6
47-8=39, 3.8÷0.19=20,
12÷
3
7
=28,
56÷4=14, 24×0.5=12, 1-
3
11
=
8
11
471-299=172,
1÷0.25=4,
3
7
×
5
6
=
5
14
600÷5=120, 8-0.8=7.2,
1
3
+
1
6
=
1
2
1.06×8×12.5=106, 1.5×0.6=0.9,
1
5
-
1
7
=
2
35
6.6+4=10.6, 1.5÷0.3=5,
1
2
÷
3
4
=
2
3
1-0.05=0.95,
2
9
×4=
8
9
2
9
+
2
3
=
8
9
6
7
÷3=
2
7
1
2
-
1
8
=
3
8
2-
4
9
-
5
9
=1,
5
9
+
1
3
=
8
9
1-
1
5
÷
3
5
=
2
3
1+
7
8
÷
7
8
=2.
点评:完成本题在保证做题质量的同时要注意提高做题的速度.
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