直接寫得數(shù)
1
4
×
2
5
=
5
7
÷5=
5
6
×12=
7
12
×
3
14
=
2
5
÷
2
5
=
1
2
÷
1
4
=
7
8
×
8
7
=
5
8
=
4
9
+
2
9
=
45×
3
5
=
1
6
÷2=
2
3
÷
8
9
=
2
3
×
9
10
=
2
3
÷
1
3
=
3
4
×0=
5
12
×
2
3
=
1-
6
7
=
5
6
÷
5
3
=
4
11
×
11
4
=
15÷
1
5
=
分析:分?jǐn)?shù)乘法:分子相乘的積做分子,分母相乘的積做分母;
分?jǐn)?shù)除法:除以一個(gè)數(shù)等于乘這個(gè)數(shù)的倒數(shù).
解答:解:
1
4
×
2
5
=
1
10
,
5
7
÷5=
1
7
,
5
6
×12=10,
7
12
×
3
14
=
1
8
,
2
5
÷
2
5
=1,
1
2
÷
1
4
=2,
7
8
×
8
7
=1,
5
8
=
8
5
4
9
+
2
9
=
2
3
,
45×
3
5
=27,
1
6
÷2=
1
12
,
2
3
÷
8
9
=
3
4
,
2
3
×
9
10
=
3
5
,
2
3
÷
1
3
=2,
3
4
×0=0,
5
12
×
2
3
=
5
18
1-
6
7
=
1
7
,
5
6
÷
5
3
=
1
2
,
4
11
×
11
4
=1,
15÷
1
5
=75.
點(diǎn)評(píng):本題考查了分?jǐn)?shù)乘除法的計(jì)算,計(jì)算時(shí)要細(xì)心,注意把結(jié)果化成最簡(jiǎn)分?jǐn)?shù).
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:

直接寫得數(shù)
5
6
=
6
17
=
3
10
+
1
2
=
3
4
-
3
5
=
2-
1
7
=
1
3
×
3
10
=
20%÷
1
2
=
1
3
×30%=
3.5+1.5= 0.5×
1
2
=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:

直接寫得數(shù)
1.4+2.6=
2.7-0.7= 8.3+0.05= 4+0.7=
2.21-1.1= 1.75+8.25= 10.58-10.5= 8.95-0.8=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:

直接寫得數(shù)
1.25×8=
0.6×0.7= 7.2÷0.8= 10×2.5=
0.36÷0.1= 0×8.6= 0.5÷0.25= 32.1×0.01=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:

直接寫得數(shù)
1.4+2.6= 2.7-0.7= 8.3+1.05= 8.95-0.8=
2.2-1.6= 2.75+8.25= 4+0.7= 10.58-1.5=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:

直接寫得數(shù)
1÷0.01= 100×0.4%=
4
7
÷
9
14
÷6=
12÷(
1
4
+
1
6
)=
1
5
÷10%=
8-8÷9= 6-
1
3
+
2
3
=
1
5
+
7
15
-
3
10
)×30=
3
8
×
4
15
=
1÷0.1×1÷0.1=
3
8
÷
9
16
×6=
1
4
-
1
4
×
1
4
=

查看答案和解析>>

同步練習(xí)冊(cè)答案