精英家教网 > 小学数学 > 题目详情
3
4
×12=
1-
5
12
=
49×2×
1
7
=
4
9
+
5
9
×2=
4
3
×
1
4
-
1
3
=
2
5
×4=
分析:49×2×
1
7
运用乘法交换律简算;
4
9
+
5
9
×2运用乘法分配律简算;
其它题目根据运算法则直接求解.
解答:解:
3
4
×12=9,
1-
5
12
=
7
12
49×2×
1
7
=14,
4
9
+
5
9
×2=2,
4
3
×
1
4
-
1
3
=0,
2
5
×4=
8
5
点评:本题考查了简单的运算,要注意根据运算法则和运算定律快速准确的得出答案.
练习册系列答案
相关习题

科目:小学数学 来源: 题型:

(2012?遵义县模拟)在○里填上>、=或<.
1
2
÷1.5○
1
2
     
5
11
×
11
12
5
11
          
3
4
÷0.01○
3
4
×0.01.

查看答案和解析>>

科目:小学数学 来源: 题型:

(2012?榆林模拟)
直接写得数.
180×40=
1-0.625= 0.5÷0.02= 0.12=
1
4
+
2
5
=
3
4
×12=
1÷5%= 4π≈

查看答案和解析>>

科目:小学数学 来源: 题型:

直接写得数
1
4
+
2
5
=
3
4
×12=
1÷5%= 1-0.625=

查看答案和解析>>

科目:小学数学 来源: 题型:

直接写出结果.
3
4
÷
3
4
=
3
4
+
3
4
=
2
5
÷10=
1-85%=
5÷1%=
3
4
×12=
1÷7×
1
7
=
5
9
×
3
8
=

查看答案和解析>>

科目:小学数学 来源: 题型:

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>>

同步练习册答案