13, 25 : 0. 125 + 13. 25 : 0. 25 - 13. 25 : 0. 5

= 13. 25 . 8 + 13. 25 . 4 - 13, 25 . 2

= 13, 25( 8 + 4 - 2 )

= 13, 25 . 10

= 132, 5

`29 xx 20,22 + 15 xx 20,22 + 20,22 xx 44 + 24 xx 10,11`

`= 20,22 xx (29 + 15 + 44 + 12)`

`= 20,22 xx 100`

`= 2022`

C1 : 29 x 20,22 + 15 x 20,22 + 20,22 x 44 + 24 x 10,11

= 29 x 20,22 + 15 x 20,22 + 20,22 x 44 + 12 x (2 x 10,11)

= 29 x 20,22 + 15 x 20,22 + 20,22 x 44 + 12 x 20,22

= 20,22 x 100

= 2022

C2: 29 x 20,22 + 15 x 20,22 + 20,22 x 44 + 24 x 10,11

= 20,22 x ( 29 + 15 + 44 + 12 )

= 20,22 x 100

= 2022

= ( 2380 + 9 x 480) : 25 - 3500 : 25 

= ( 2380 + 4320 - 3500 ) : 25 

= 3200 : 25 

= 128

\(x\times\left(0,1+4+2,9+2+1\right)=25,2\)

\(10x=25,2\)

\(x=2,52\)

\(x\times0,1+x\times4+x\times2,9+x\times2+x=25,2\)

\(x\times\left(0,1+4+2,9+2+1\right)=25,2\)

\(x\times10=25,2\)

\(x=25,2:10\)

\(x=2,52\)

tìm x mè giải thích sao :v?

tìm X hay tính thuận tiện

a, 13 \(\times\) 15 - 150 + 97 \(\times\)15

13 \(\times\) 15 - 15 \(\times\) 10 + 97 \(\times\) 15

= 15 \(\times\) ( 13 - 10 + 97)

= 15 \(\times\) ( 3 + 97)

= 15 \(\times\) 100

=1500   

b, \(\dfrac{2016}{2015}\) \(\times\) \(\dfrac{4}{7}\) - \(\dfrac{4}{7}\) \(\times\) \(\dfrac{1}{2015}\) + \(\dfrac{3}{7}\)

= \(\dfrac{4}{7}\) \(\times\) ( \(\dfrac{2016}{2015}\) - \(\dfrac{1}{2015}\)) + \(\dfrac{3}{7}\) 

= \(\dfrac{4}{7}\) \(\times\) \(\dfrac{2015}{2015}\) + \(\dfrac{3}{7}\)

= \(\dfrac{4}{7}\) + \(\dfrac{3}{7}\)

= \(\dfrac{7}{7}\)

= 1

a, \(13\) \(\times\) 15 - 150 + 97 \(\times\) 15

= 15 \(\times\) ( 13 - 10 + 97)

= 15 \(\times\) ( 3 + 97)

= 15 \(\times\) 100

= 1500  

b, \(\dfrac{2016}{2015}\) \(\times\) \(\dfrac{4}{7}\) - \(\dfrac{4}{7}\) \(\times\) \(\dfrac{1}{2015}\) + \(\dfrac{3}{7}\)

= \(\dfrac{4}{7}\) \(\times\) ( \(\dfrac{2016}{2015}\) - \(\dfrac{1}{2015}\)) + \(\dfrac{3}{7}\)

= \(\dfrac{4}{7}\) \(\times\) \(\dfrac{2015}{2015}\) + \(\dfrac{3}{7}\)

= \(\dfrac{4}{7}\) + \(\dfrac{3}{7}\)

= \(\dfrac{7}{7}\)

= 1

\(\dfrac{3}{5}\times\dfrac{2}{7}-\dfrac{3}{5}\times\dfrac{4}{7} +\dfrac{3}{5}\)

\(=\dfrac{3}{5}\times\left(1+\dfrac{2}{7}-\dfrac{4}{7}\right)\)

\(=\dfrac{3}{5}\times\left(\dfrac{7}{7}+\dfrac{2}{7}-\dfrac{4}{7}\right)\)

\(=\dfrac{3}{5}\times\left(\dfrac{7+2-4}{7}\right)\)

\(=\dfrac{3}{5}\times\dfrac{5}{7}\)

\(=\dfrac{3}{7}\)

= 3/5 x 2/7 - 3/5 x 4/7 + 3/5 x 1

= 3/5 x ( 2/7 + 4/7 + 1 )

= 3/5 x 1

= 3/5

nhớ tích nha

a) \(2,4:0,25+5,6:4+2\times\frac{1}{4}\)

\(=2,4\times\frac{1}{4}+5,6\times\frac{1}{4}+2\times\frac{1}{4}\)

\(=\left(2,4+5,6+2\right)\times\frac{1}{4}\)

\(=10\times\frac{1}{4}=\frac{5}{2}\)

b)\(3,47\times\frac{1}{2}-2,47:2+0,5\)

\(=3,47\times\frac{1}{2}-2,47\times\frac{1}{2}+\frac{1}{2}\times1\)

\(=\left(3,47-2,47+1\right)\times\frac{1}{2}\)

\(=2\times\frac{1}{2}=1\)

#Y/n

H

sai đề câu a rồi hay sao bạn ơi bạn thử kiểm lại đi nhé

ủa dễ mà đáp an là a 01682

a, 15,5: 0,125 + 15,5: 0,2+ 15,5:0,5 + 15,5:0,25

= 15,5 \(\times\) 8 + 15,5 \(\times\) 5 + 15,5 \(\times\) 2 + 15,5 \(\times\) 4

= 15,5 \(\times\)8 + 15,5 \(\times\) 5 + 15,5 \(\times\)2 + 15,5 \(\times\) 5 - 15,5

= 15,5 \(\times\) ( 8 + 5 + 2 + 5) - 15,5

= 15,5 \(\times\)   20 - 15,5

= 310 -15,5

= 294,5

b, 22,1 : 0,25 + 22,1 : 0,5 + 22,1 : 0,2 + 22,1: 0,125

= 22,1 \(\times\) 4 + 22,1 \(\times\)2 + 22,1 \(\times\) 5 + 22,1 \(\times\) 8

= 22,1 \(\times\) 5 - 22,1 + 22,1 \(\times\) 2 + 22,1 \(\times\) 5 + 22,1 \(\times\) 8

= 22,1 \(\times\) ( 5 + 2 + 5 + 8)  - 22,1

= 22,1 \(\times\) 20 - 22,1

= 442 - 22,1

= 419,9