1/3  x 5/8 + 5/8 x 2/3 = 5/8 x { 1/3 + 2/3} = 5/8 x 9/9 =5/8 x1=5/8 nhé cho mình 1 tích 

 chúc bạn học giỏi

\(\dfrac{1}{3}\times\dfrac{5}{8}+\dfrac{5}{8}\times\dfrac{2}{3}=\dfrac{5}{8}\times\left(\dfrac{1}{3}+\dfrac{2}{3}\right)=\dfrac{5}{8}\times1=\dfrac{5}{8}\)

7

^{_{\(3\times\dfrac{7}{10}+\dfrac{7}{10}\times5+2\times\dfrac{7}{10}\)}}

^{_{\(=\dfrac{7}{10}\times\left(3+5+2\right)\)}}

^{_{\(=\dfrac{7}{10}\times10\)}}

^_\(=7\)

\(3\times\dfrac{7}{10}+\dfrac{7}{10}\times5+2\times\dfrac{7}{10}=\dfrac{7}{10}\left(3+5+2\right)=\dfrac{7}{10}\times10=7\)

2,3 x 4,5 + 2,3 x 2,5 + 7 x 7,7
= 2,3 x ( 4,5 + 2,5 ) + 7 x 7,7
= (2,3 x 7) + (7 x 7,7)
= 16,1 + 53,9 = 73

= 2,3 + 7,7 x 4,5 + 2,5 x 2,3 + 7 

=      10      x          7   x 2,3 + 7

=                   168 

Mình đoán vậy

\(2,3\times4,5+2,3\times2,5+7\times7,7\)

\(=2,3\times\left(4,5+2,5\right)+7\times7,7\)

\(=2,3\times7+7\times7,7\)

\(=7\times\left(2,3+7,7\right)\)

\(=7\times10\)

\(=70\)

=7/10(3+5+2)

=7/10*10

=7

3 x 7/10 + 7/10 x 5 + 2 x 7/10

= 7/10 x (3 + 5 + 2)

= 7/10 x 10

= 7

\(3\times\dfrac{7}{10}+\dfrac{7}{10}\times5+2\times\dfrac{7}{10}\)

\(=\dfrac{7}{10}\times\left(3+5+2\right)\)

\(=\dfrac{7}{10}\times10\)

\(=7\)

\(\dfrac{7}{10}\times\left(3+5+2\right)=\dfrac{7}{10}\times10=\dfrac{70}{10}=7\)

`3xx7/10+7/10xx5+2xx7/10`

`=7/10xx(3+5+2)`

`=7/10xx10`

`=7`

725 : 25 + 275 : 25

= ( 725 + 275 ) : 25

= 1000 : 25

= 40

725 : 25 + 275 : 25

= ( 725 + 275 ) : ( 25 + 25 )

= 1000 : 50

= 20

Cho minhf 1 like nha

725 : 25 + 275 : 25

= ( 725 + 275 ) : 25

= 1000 : 25

= 40

lx

Uả cái j zị

ảnh đâu 

3,62x12-2x3,62

=3,62x(12-2)

=3,62x10

=36,2

36,2

36,2