4
5
=
( )
25
=8÷
10
10
=
0.8
0.8
(填小數(shù))
分析:解答此題的關(guān)鍵是
4
5
,分子分母同時乘5可得
20
25
;寫成除法算式是:4÷5=8÷10,計算結(jié)果是小數(shù)0.8.由此即可填空.
解答:解:根據(jù)題干分析可得:
4
5
=
20
25
=8÷10=0.8.
故答案為:20;10;0.8.
點評:此題考查小數(shù)、分數(shù)、百分數(shù)之間和比、除法之間的轉(zhuǎn)化,根據(jù)它們之間的關(guān)系和性質(zhì)進行轉(zhuǎn)化即可.
練習冊系列答案
相關(guān)習題

科目:小學數(shù)學 來源: 題型:

(2012?石阡縣模擬)
直接寫得數(shù)
9.9+9=
2.5×40=
1
2
+
1
3
=
2.5-0.36-0.64=
1.8÷0.18= 13÷80= 89×101≈ 45÷1.25÷8=

查看答案和解析>>

科目:小學數(shù)學 來源: 題型:

180÷60= 12×25= 0÷90=
4×5÷4×5= 0.25×4+4= 131+218+269+182=
25×6×4= 420÷35= 36×5×4=
120÷5÷3= 198-75-25= 120-20÷5=
59億-58億= (1.3+3.5)÷0.6= 75÷2.5=
0.45÷1.25÷8= 2.5×7.6×4= 97.6÷0.02=
8.8-(0.25+0.4)= 0.25+87+0.75= 0.8-0.35×2=
0.1÷0.01×0.1= 9.9+9.9×99= 2.7×3.6+6.4×2.7=
720÷8÷9= 2.9+5.7+2.1= 2-0.16-0.64=
16.7+84.5-16.7= 6.8-(3.8+2.9)= 9×1.3+9×6.7=
5.5-5.25+5.2= 0.8×25-10= 42.8×25×4=
7.2+2.8= 0.9÷0.01= 3.5+7.6=
3×0.2×0.5= 0.96÷0.3= 1.5×0.4=
7÷0.25= 2.5×0.7×0.8= 8-2.5=
16÷1.6= 5.6×1.01= 8×(2.5+0.25)=
0.36+0.64= 64.32÷16= 72.8÷0.8=
8.4×0.2+1.6×0.2= 8.4÷4.2= 0.05×0.8=
2.56-0.37= 1.23×3= 25×0.8×0.5=
12×2.5= 3.2÷1.6= 3.5+3.5×3=
19.6÷2= 8.8÷2.2= 3.9+2.03=
7.2×0.3+2.8×0.3= 13.8+9.9= 2.4×2.5=
0.75×4= (1.5+0.25)×4= 4.2÷0.1=
4.2÷3.5= 2.14-0.9= 27+456+73=
12÷0.3= 2.87÷0.7= 13÷4=
24÷4+56÷4= 2.1×0.3÷2.1= 2.3-0÷8.1=
1.37-1.37÷1.37= 4.4÷(5×0.2)= 7×1.3=
0.96÷0.06= 0.36×0.3= 0.35÷0.7=
13.65÷13= 4×0.8×0.25×1.25= 13+0.7÷0.7=
7.05×23.7+7.05×76.3= 0.125×3.2×2.5= (12+23.1÷0.75)×0.4-5.12=
728+199= 637-201= 16×25=
1.6×[(12-7.2)÷(0.84÷2.1)]=

查看答案和解析>>

科目:小學數(shù)學 來源: 題型:

(2008?豐縣)
直接寫出得數(shù).
24×5=
0.77+0.33= 2-
3
14
=
1÷0.25=
4
5
×15÷
4
5
×15=
25×8×4×0.125= 0.1÷0.001=
1
4
+
1
4
-
1
4
×
1
4
=
3.14×
4
4
2=50.24      
1
2
-
1
3
=

查看答案和解析>>

科目:小學數(shù)學 來源: 題型:

(2011?富源縣模擬)直接寫得數(shù)
39×
7
13
×
2
3
=
2005+620= 1-
1
5
+
4
5
=
0.25×8.5×4=
1
2
+
2
5
=
2.68+9-2.68+9= 4.8×11-4.8= 5-1.4-1.6=
14÷35= 2-
1
5
-
3
5
=
8.75-(0.75+3.4)=
2
3
×
3
2
=.

查看答案和解析>>

科目:小學數(shù)學 來源: 題型:

直接寫出得數(shù).
2009+620= 1-0.09= 0.45×101= 2÷0.02=
1
4
×
2
3
=
5-
2
7
=
1-
1
5
+
4
5
=
0.25×8.5×4=

查看答案和解析>>

同步練習冊答案