口算
1
4
×
1
3
=
4
7
÷2
=
1
2
÷
1
2
=
10÷
5
6
=
2
3
×
3
4
=
9
10
÷
1
5
=
1
6
÷6
=
8
9
÷4
=
15×
4
5
=
15÷
1
3
=
3
4
×
2
9
=
2
3
÷
1
2
=
2
5
×
1
2
=
1
2
÷
1
4
=
1
2
×
1
4
=
4
5
÷
1
5
=
3
7
×14
=
1
4
÷
1
2
=
1
2
-
1
4
=
4
9
×
3
4
=
5
8
×
2
5
=
1
6
÷
2
3
=
1
2
+
1
4
=
3
5
÷1
=
7
15
×5
=
3
4
=
1
2
÷
1
4
=
3
5
=
3
4
×12
=
1
5
÷
2
3
=
7
9
×
3
7
=
1-
3
5
=
18×
5
6
=
7
5
=
1
3
+
1
6
=
1+
3
5
=
2
9
×
1
4
=
8
3
÷2
=
3
5
÷
2
5
=
5
9
÷3
=
5
6
×
3
10
=
2
5
÷
1
2
=
1
4
=
3
4
=
30×
1
3
=
4
5
÷2
=
5
24
÷
5
6
=
5
8
×
1
2
×0
=
1
3
×
3
11
=
1
4
=
9
10
÷
3
5
=
1
3
÷
1
2
=
9
11
=
2
5
÷
1
5
=
1
3
÷
1
3
=
2
9
÷
1
2
=
5
6
×
6
5
=
1
5
÷
1
3
=
5
12
=
1
2
÷
1
2
=
分析:
1
2
-
1
4
,
1
2
+
1
4
,1-
3
5
,
1
3
+
1
6
,計(jì)算時(shí)注意先通分再計(jì)算;0×
2
9
÷
1
2
,0÷
1
3
÷
1
2
,0÷
5
12
根據(jù)0和任何不等于0的數(shù)相乘,相除都得0計(jì)算;其他按運(yùn)算法則計(jì)算.
解答:解:口算
1
4
×
1
3
=
1
12
,
4
7
÷2
=
2
7
,
1
2
÷
1
2
=1,
10÷
5
6
=12,
2
3
×
3
4
=
1
2
,
9
10
÷
1
5
=
9
2
,
1
6
÷6
=
1
36
,
8
9
÷4
=
2
9
,
15×
4
5
=12,
15÷
1
3
=45,
3
4
×
2
9
=
1
6
2
3
÷
1
2
=
4
3
,
2
5
×
1
2
=
1
5
1
2
÷
1
4
=2,
1
2
×
1
4
=
1
8
4
5
÷
1
5
=4,
3
7
×14
=6,
1
4
÷
1
2
=
1
2
,
1
2
-
1
4
=
1
4
,
4
9
×
3
4
=
1
3
,
5
8
×
2
5
=
1
4
1
6
÷
2
3
=
1
4
1
2
+
1
4
=
3
4
,
3
5
÷1
=
3
5
7
15
×5
=
7
3
,
3
4
=
4
3
1
2
÷
1
4
=2,
3
5
=
5
3
,
3
4
×12
=9,
1
5
÷
2
3
=
3
10
,
7
9
×
3
7
=
1
3
1-
3
5
=
2
5
,
18×
5
6
=15,
7
5
=5,
1
3
+
1
6
=
1
2
,
1+
3
5
=1.6,
2
9
×
1
4
=
1
18
,
8
3
÷2
=
4
3
,
3
5
÷
2
5
=
3
2
,
5
9
÷3
=
5
27
5
6
×
3
10
=
1
4
,
2
5
÷
1
2
=
4
5
1
4
=2,
3
4
=12,
30×
1
3
=10,
4
5
÷2
=
2
5
,
5
24
÷
5
6
=
1
4
,
5
8
×
1
2
×0
=0,
1
3
×
3
11
=
1
11
,
1
4
=32,
9
10
÷
3
5
=
3
2
1
3
÷
1
2
=0,
9
11
=
9
11
,
2
5
÷
1
5
=2,
1
3
÷
1
3
=1,
2
9
÷
1
2
=0,
5
6
×
6
5
=1,
1
5
÷
1
3
=
3
5
,
5
12
=0,
1
2
÷
1
2
=1.
點(diǎn)評(píng):此題考查同學(xué)們快速計(jì)算的能力,根據(jù)算式的特點(diǎn),靈活選擇計(jì)算方法.
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:

口算.
4
5
=
11-
4
9
=
1
3
+
1
4
=
1
2
÷3
=
0.125×8=
1
2
×
4
5
=
0.37+1.3=
1
2
÷
1
8
=
4-
7
8
-
1
8
=
2008×99+2008=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

口算
1
4
+
1
3
=
1
3
-
1
5
=
1
9
=
2
27
×9=
12
17
÷12=
2
9
×
3
4
=
3
4
÷
1
6
=
3
8
=
7.8×9+7.8=
5
6
+
4
11
×0=
24×(
3
8
+
5
6
)=
12×
2
25
-
24
25
=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

口算:
1.6×5
910-530 12.6÷3 3.48+6.52
39÷13 3÷0.01
3
5
+
4
5
2
3
+
1
4
5
6
×
3
5
1.02-0.42
5
9
8
9
÷
16
15

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

口算
(1)12÷
1
2
=
(2)1÷1%= (3)9.5+0.5= (4)
1
3
+
1
4
=
(5)0÷
1
5
×2=
(6)1-
11
12
=
(7)
7
8
×
5
14
=
(8)
7
12
÷
7
4
=
(9)
4
5
-
1
2
=
(10)
1
9
×
7
8
×9=

查看答案和解析>>

同步練習(xí)冊(cè)答案