题目内容

(2012?中山模拟)
直接写出得数.
8.1÷0.03=
3
5
+3=
5
16
×
8
15
=
1.5×4=
7.45+8.55= 70-34= 0.36+0.4= 84÷7=
19+24= 0.4÷0.05=
1
3
+
1
6
=
8
13
-
2
13
=
134-18= 0×26= 0.25÷0.01=
1
6
=
3
5
×
2
3
=
39+26=
5
7
-
5
14
=
14
9
÷
10
3
=
9
14
×20=
0.3÷
6
5
=
7
10
×
5
21
=
0.25×0.6=
8
9
×
9
24
=
7
9
-
1
3
=
2.5×0.4= 1÷10%=
4.8÷12%=
12
5
÷10=
分析:根据小数、整数、分数、百分数的加减乘除的计算方法进行计算即可.
解答:解:
8.1÷0.03=270,
3
5
+3=3
3
5
5
16
×
8
15
=
1
6
1.5×4=6,
7.45+8.55=16, 70-34=36, 0.36+0.4=0.76, 84÷7=12,
19+24=43, 0.4÷0.05=8,
1
3
+
1
6
=
1
2
8
13
-
2
13
=
6
13
134-18=116, 0×26=0, 0.25÷0.01=25,
1
6
=6,
3
5
×
2
3
=
2
5
39+26=65,
5
7
-
5
14
=
5
14
14
9
÷
10
3
=
7
15
9
14
×20=
90
7
0.3÷
6
5
=0.25,
7
10
×
5
21
=
1
6
0.25×0.6=0.15,
8
9
×
9
24
=
1
3
7
9
-
1
3
=
4
9
2.5×0.4=1, 1÷10%=10,
4.8÷12%=40,
12
5
÷10=0.24.
点评:口算时,看清符号和数据,然后再进行计算即可.
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