1
4
+
1
6
=
2
3
-
1
2
=
3
5
=
4
9
×36
=
3.14×5=
11
9
×
3
23
=
4
9
÷
4
11
=
3
10
÷
2
5
=
6
11
×
5
12
=
1
5
÷
3
20
=
分析:同分母相加減:分母不變,分子相加減;異分母相加減:先通分,然后按同分母相加減的計(jì)算法則進(jìn)行計(jì)算.
除以一個(gè)數(shù),等于乘這個(gè)數(shù)的倒數(shù);兩個(gè)分?jǐn)?shù)相乘,分子相乘的積做分子,分母相乘的積做分母,能化簡(jiǎn)的要化簡(jiǎn),據(jù)此解答即可.
解答:解:(1)
1
4
+
1
6

=
3
12
+
2
12
,
=
5
12
;

(2)
2
3
-
1
2
,
=
4
6
-
3
6

=
1
6
;

(3)1÷
3
5
=
5
3
;

(4)
4
9
×36=16


(5)3.14×5=15.7;

(6)
11
9
×
3
23
=
11
69
;

(7)
4
9
÷
4
11
,
=
4
9
×
11
4
,
=
11
9
;

(8)
3
10
÷
2
5
,
=
3
10
×
5
2

=
3
4
;

(9)
6
11
×
5
12
=
5
22
;

(10)
1
5
÷
3
20
,
=
1
5
×
20
3

=
4
3
點(diǎn)評(píng):此題主要考查分?jǐn)?shù)加減乘除法的計(jì)算法則的靈活應(yīng)用.
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

計(jì)算下面各題.
[1-(
1
4
+
3
8
)]÷
1
4
                           
1
6
×
2
3
÷(
4
5
-
8
15

15
16
+(
7
16
-
1
4
)÷
1
2
                        12÷[(
5
6
-
1
3
)×6].

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

(2008?納溪區(qū)模擬)
直接寫(xiě)出得數(shù).   
21.8+8.2=
4
5
÷
5
6
=
6
11
×
11
18
=
5-
5
8
=
8×25×1.25=
1
2
×
1
4
=
1
6
+
2
3
=
1
3
=
25÷10%= (0.28+0.7)÷7=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

直接寫(xiě)出結(jié)果.
1-
5
8
=
1
2
-
1
3
=
1
3
+
1
4
=
1
6
+
2
3
=
1-
1
5
-
4
5
=
4
7
+
5
7
=
4
5
-
4
5
=
1
4
+
3
4
=
1
2
-
3
8
=
5
8
+
6
7
+
3
8
=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

6+17= 156-156= 4500÷9= 41+18= 3600÷30=
57+43= 48÷12= 1.8+3.5= 7-3.8= 35×60=
35×10= 1500÷10= 0÷46.79= 1.5÷5= 8÷5=
1
4
+
1
4
=
1
2
+
1
2
=
1-
9
10
=
1
2
-
1
3
3
4
-
1
8
=
3-
2
5
=
2
3
×2=
3
10
×
2
3
=
2
5
÷
4
15
=
40×80=
80-17 32×20 75-69= 13×5= 8.7-2.4=
2000+400= 1.4×100= 1.2÷100= 124.6×1= 7.256÷7.256=
1.2÷0.2= 24×10%=
1
3
+0.5=
2+
1
4
=
1
4
+
1
6
=
2
3
÷2=
3
5
÷
3
5
=
1
3
×0.2=

查看答案和解析>>

同步練習(xí)冊(cè)答案