直接寫得數(shù)
1
4
×
3
5
=
9
16
×
16
53
=
21×
2
43
=
5
6
=
10÷
5
9
=
1
4
+0.5=
1-
3
4
=
2÷0.2=
8
25
÷
4
5
=
1
4
4
9
=
分析:
1
4
+0.5先把分數(shù)化成小數(shù)再計算;
1
4
4
9
根據(jù)比與除法的關(guān)系,變成
1
4
÷
4
9
,然后計算;其它題目根據(jù)運算法則直接求解.
解答:
解:
1
4
×
3
5
=
3
20
,
9
16
×
16
53
=
9
53
21×
2
43
=
42
43
,
5
6
=
36
5
10÷
5
9
=18,
1
4
+0.5=0.75,
1-
3
4
=
1
4
,
2÷0.2=10,
8
25
÷
4
5
=
2
5
,
1
4
4
9
=
9
16
故答案為:
3
20
,
9
53
,
42
43
,
36
5
,18,0.75,
1
4
,10,
2
5
,
9
16
點評:本題考查了基本的運算,計算時要細心,注意把結(jié)果化成最簡分數(shù).
練習冊系列答案
相關(guān)習題

科目:小學數(shù)學 來源: 題型:

直接寫得數(shù).
3
5
÷3
=
3
4
×2
=
1
2
÷3
=
3
5
=
4
5
÷
1
5
=
15÷
3
2
=
1
4
÷
2
3
=
4
7
+
2
7
=

查看答案和解析>>

科目:小學數(shù)學 來源: 題型:

直接寫得數(shù):
3
5
×
1
2
=
3
10
3
10
     
1
2
÷3=
1
6
1
6
    
 
1
3
-
1
4
=
1
12
1
12
      
10÷
5
7
=
14
14
7
12
÷
7
4
=
1
3
1
3
     
5
6
÷
2
3
=
1
1
4
1
1
4
    
1
9
÷
1
3
=
1
3
1
3
     
2
7
=
3
1
2
3
1
2
  
5
16
×
8
15
=
1
6
1
6
   
 7+
5
9
=
7
5
9
7
5
9

查看答案和解析>>

科目:小學數(shù)學 來源: 題型:

直接寫得數(shù).
3
5
×15=
6
7
÷3=
7
8
÷
7
10
=
5
24
=
72÷
8
9
=
2
3
÷3=
2
2
5
×
5
6
=
1
4
×
1
5
×10=

查看答案和解析>>

科目:小學數(shù)學 來源: 題型:

直接寫得數(shù)
1
4
÷
2
3
=
3
4
×
4
7
=
1
3
-
1
4
=
1
8
=
5
12
×
5
6
=
32÷
4
5
=
5-
1
2
=
5
14
×35=

查看答案和解析>>

同步練習冊答案