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
=
分析:根據(jù)分?jǐn)?shù)和小數(shù)的加減乘除的計(jì)算方法進(jìn)行計(jì)算即可;7.8×9+7.8和24×(
3
8
+
5
6
)可以根據(jù)乘法分配律進(jìn)行簡算.
解答:解:
1
4
+
1
3
=
7
12
1
3
-
1
5
=
2
15
,
1
9
=9,
2
27
×9=
2
3
12
17
÷12=
1
17
,
2
9
×
3
4
=
1
6
3
4
÷
1
6
=
9
2
,
3
8
=0,
7.8×9+7.8=78,
5
6
+
4
11
×0=
5
6
24×(
3
8
+
5
6
)=29,
12×
2
25
-
24
25
=0.
點(diǎn)評(píng):口算時(shí),注意給出的數(shù)據(jù)和計(jì)算的符號(hào),能簡算的要簡算.
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目:小學(xué)數(shù)學(xué) 來源: 題型:

口算.
(1)7.2+2.08=
(2)
1
3
+
1
4
=
(3)
7
10
÷
1
2
=
(4)0÷0.99=
(5)32×0.125=
(6)0.75×3÷
3
4
=
(7)
1
5
+3.2÷16×4=
(8)
1
2
-
1
2
×
1
2
=
(9)0.8÷0.01=
(10)10×
1
3
-1÷3=
(11)8.4÷0.7=
(12)
2
3
×5÷
2
3
×5
(13)0.23=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:

口算.
1
3
-
1
4
=
5-
5
7
=
4
27
×
9
16
=
2-
2
3
×2=
1
2
-
1
6
=
3
5
+
4
5
=
3
4
+
1
5
=
12-
3
8
=
4
5
×
3
2
=
1+
3
2
×
2
3
=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:

口算.
1
3
+
1
4
=
1
5
-
1
6
=
1-
5
8
=
1
4
+
1
5
=
2
7
+
1
3
=
1-
7
15
=
3
4
-
1
6
=
7
10
-
1
2
=
3
8
-
1
4
=
5
9
-
4
9
=
1
2
-
1
4
=
1-
13
13
=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:

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
=

查看答案和解析>>

同步練習(xí)冊(cè)答案