题目内容

直接写出得数
3
4
×
2
3
=
1
8
×
2
5
=
5
6
×18=
4
5
÷8=
4
7
=
3
4
×
7
2
×
4
5
=
5
6
÷
1
2
=
3
10
÷
14
15
=
8
9
÷
4
7
÷
1
3
=
0.25+
3
4
=
1
2
-
1
4
=
5
14
÷
4
21
×
16
25
=
2
7
÷
8
21
=
3
14
×
7
8
=
8-4÷
4
7
=
5
6
-
1
2
=
7
18
÷14=
12×(
2
3
-
1
6
)=
5%×5=
1
5
+
2
7
+
4
5
+
3
7
=
3.75+
5
8
=
63%-27%= (1-20%)÷20%= 0.4÷
2
5
=
4
9
×1.8=
4
9
×25%=
分析:题目较多,都是有关小数、百分数、分数的四则混合运算,根据题目特点,运用运算定律、数字转化等方法,解答此题.
解答:解:
3
4
×
2
3
=
1
2
1
8
×
2
5
=
1
20
5
6
×18=15,
4
5
÷8=
1
10
4
7
=
21
2
3
4
×
7
2
×
4
5
=
21
10
5
6
÷
1
2
=
5
3
3
10
÷
14
15
=
9
28
8
9
÷
4
7
÷
1
3
=
14
3
0.25+
3
4
=1,
1
2
-
1
4
=
1
4
5
14
÷
4
21
×
16
25
=
6
5
2
7
÷
8
21
=
3
4
3
14
×
7
8
=
3
16
8-4÷
4
7
=1,
5
6
-
1
2
=
1
3
7
18
÷14=
1
36
12×(
2
3
-
1
6
)=6,
5%×5=0.25,
1
5
+
2
7
+
4
5
+
3
7
=1
5
7
3.75+
5
8
=4.375,
63%-27%=0.36, (1-20%)÷20%=4, 0.4÷
2
5
=1,
4
9
×1.8=0.8,
4
9
×25%=
1
9
点评:此题考查了多方面的知识:约分、乘除法的转化、数字转换、运算定律的运用等.
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