0.8:
23
=Χ:6
分析:根據(jù)比例的性質(zhì),把比例先改寫(xiě)成兩個(gè)內(nèi)項(xiàng)的積等于兩個(gè)外項(xiàng)的積的形式,再進(jìn)一步求出比例中的未知項(xiàng).
解答:解:0.8:
2
3
=Χ:6
,
2
3
X=0.8×6,
2
3
X=4.8,
X=7.2.
故答案為:X=7.2.
點(diǎn)評(píng):此題考查比例性質(zhì)的運(yùn)用即解比例.
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
3.2×0.2             
1.4×0.4           3.3÷3          1.2÷0.3
2.5×0.4             1.5×2            0.7×7           7.3+0.3
0.53-0.3             1.8×0.5           0.9×0.01        0.23×3
(5)2-1.2               7.8÷6             8.4÷0.21         8.4÷0.7
5.6+3.6            9-2.35              0.56÷8         1.23×3
5.6÷0.4            4.5÷0.9            8.1×2          90÷3
1.23+3             5.6+1.23           4.5×2          5.6÷1.4
4.8÷1.2           7.2÷0.9           6.6÷1.1          7.2÷6
2.1÷3             0.6×0.5           3.23×2          1.8÷3
12.5÷0.1          0.32÷0.8          1.6+3.7           0.45×0.2
0.36÷1.8          0.4×0.5            8.4+5.6         8.4÷2.1
4.8÷0.08          4.8÷0.8            3+2.3           9.3÷3
0.01×8           7.31×100          0.09×6         0.8×0.6
1.25×8            3÷5               2.3+2.3         6.23+3.6

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

口算.
2.5×0.4= 1.5×2= 0.7×7= 7.3+0.3=
0.53-0.3= 1.8×0.5= 0.9×0.01= 0.23×3=
0.56÷8= 1.23×3= 1.6÷0.04= 7.3+2.7=
2-1.2= 7.8÷6= 8.4÷0.21= 8.4÷0.7=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

x
25
=
1.2
75
25:x=
1
4
:4
6.5:x=3.25:4
1
8
1
10
=
1
4
:x
0.8:
2
3
=x:6
27:x=15:
5
9
4:
2
3
=
x
25
x:3=0.5:5
4
9
1
6
=x:15
3
4
:x=3:12
3
10
1
5
=
1
4
:x
4
9
1
6
=x:15
13:7=
x
14
6:x=1
1
5
:50%
2
3
1
6
=x:12

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:解答題

口算.
2.5×0.4=1.5×2=0.7×7=7.3+0.3=
0.53-0.3=1.8×0.5=0.9×0.01=0.23×3=
0.56÷8=1.23×3=1.6÷0.04=7.3+2.7=
2-1.2=7.8÷6=8.4÷0.21=8.4÷0.7=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:解答題

(1)3.2×0.2             1.4×0.4          3.3÷3         1.2÷0.3
(2)2.5×0.4            1.5×2           0.7×7           7.3+0.3
(3)0.53-0.3            1.8×0.5          0.9×0.01       0.23×3
(4)0.56÷8            1.23×3           1.6÷0.04        7.3+2.7
(5)2-1.2              7.8÷6            8.4÷0.21        8.4÷0.7
(6)5.6+3.6           9-2.35             0.56÷8        1.23×3
(7)5.6÷0.4           4.5÷0.9           8.1×2         90÷3
(8)1.23+3            5.6+1.23          4.5×2         5.6÷1.4
(9)4.8÷1.2          7.2÷0.9          6.6÷1.1         7.2÷6
(10)2.1÷3            0.6×0.5          3.23×2         1.8÷3
(11)12.5÷0.1         0.32÷0.8         1.6+3.7          0.45×0.2
(12)0.36÷1.8         0.4×0.5           8.4+5.6        8.4÷2.1
(13)4.8÷0.08         4.8÷0.8           3+2.3          9.3÷3
(14)0.01×8          7.31×100         0.09×6        0.8×0.6
(15)1.25×8           3÷5              2.3+2.3        6.23+3.6.

查看答案和解析>>

同步練習(xí)冊(cè)答案