=8 ( )+2=7 9+=12 =10 查看更多

 

题目列表(包括答案和解析)

7.5-(2.5+3.8)=
 
7×1.3+7×6.7=
 
10.8-3.9-4.1=
 
1
4
+
2
5
+
3
5
=
 
1
2
+
1
3
+
1
2
=
 
3
8
+
1
9
+
1
8
+
8
9
=
 
1
4
+
2
7
+
5
7
+
3
4
=
 
5
4
-
9
14
-
5
14
=
 
10
9
-
14
17
-
3
17
=
 
 
7
13
+
1
2
-
7
13
=
 

查看答案和解析>>

6月份的月历表。这个月有5个星期日,但这个月的1日不是星期日。把月历表填完整,先把日期号填完整,再在第一行的括号中填上星期几。
星形(   )
星形(   )
星形(   )
星形(   )
星形(   )
星形(   )
星形(   )
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
 
 
  
  
  
  
 
  
  

查看答案和解析>>

在2的倍数上画“△“,在3的倍数上画“○”.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45
上表中,是2和3公倍数的有
6,12,18,24,30,36,42
6,12,18,24,30,36,42
,最小公倍数是
6
6

查看答案和解析>>

3
4
×2
=
1
6
+
1
2
=
5
9
÷5
=
1
12
×
6
7
=
3
4
÷3
=
5
4
×
5
4
=
5
8
÷1
=
5-
2
3
=
3
9
×12
=
3
5
×
5
12
=
4-
2
3
=
7
12
×3
=
2
7
÷14
=
8+
3
5
=
13
30
=
39×
3
13
=
1
2
=
5
6
÷
3
4
=
12
7
=
20÷
4
5
=
1-
9
10
=
2.5×16=
5
12
÷
1
6
=
3
2
×
4
5
=
8
15
÷24
=
11÷
22
8
=
1
2
÷
3
8
=
4
7
÷
2
3
=
3
4
+
1
7
=
1.5÷0.05=
1
9
×9
=
1.5÷0.05=
5
8
÷
7
12
=
4
5
×
2
3
×
5
6
=
5
9
×
2
5
=
2.5×0.4=
14×
5
16
=
(
1
2
+
1
3
)×12
=
14
33
×
3
7
=
7
9
=
5
8
×
5
8
=
5
21
+
4
7
=
7
9
÷7
=
2-
1
4
=
3
5
-
1
8
=
4
21
÷
8
7
=
2
3
-
1
4
=
6.25+1.75=
1
2
÷
7
18
=
9
10
×6
=
1
8
+
1
9
=
3
4
÷
4
3
=
1
2
×
2
3
=
12-
5
7
=
2
5
=
2
9
÷18
=
7
28
÷
2
9
=
10×1×
2
5
=
20÷
4
5
=
1
3
×9+9×
2
3
=
42÷
21
23
=
3
8
÷12
=

查看答案和解析>>

在2的倍数上画▲,在5的倍数上画○.
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
2和5的公倍数有
 
,最小的公倍数是
 

查看答案和解析>>


同步练习册答案