=5/2

A = 0,25 \(\times\) 6 + \(\dfrac{1}{4}\) + 75%

A = 0,25 \(\times\) 6 + 0,25 + 0,75

A = 0,25 \(\times\) 6 + 0,25 \(\times\) 1 + 0,25 \(\times\) 3

A = 0,25 \(\times\) ( 6 + 1 + 3)

A = 0,25 \(\times\) 10

A = 2,5 

0,25 x 6 + 0,25 + 0,75 

= (0,25 x 6) + (0,25 + 0,75) 

= 1,5 + 1 

= 2,5

0,25 x 6 + 1/4 + 75%

= 0,25 x 6 + 0,25 + 0,75

= 0,25 x ( 6+1) + 0,75

= 0,25 x 7 + 0,75

= 1,75 + 0,75 = 2,5

Trả L:

1,25 x 0,25 x 8 x 4

= ( 1,25 x 8 ) x ( 0,25 x 4 )

= 10 x 1

= 10

hok tốt

💯💯💯💯💯💯💯💯💯💯💯💯💯💯💯💯💯💯 hepmi 

=3/4.0,25+3/4.1,25-3/4.0,5

=3/4.(0,25+1,25-0,5)

=3/4.10

=15/2

`3/4.0,25+3/4.1,25-3/4.0,5`

`=3/4.(0,25+1,25-0,5)`

`=3/4xx10=15/2`

=3/4x(0,25+1,25-0,5)=3/4x10=15/2

Lời giải:
$=27\times 2+12,44\times 4+17,56\times 4+23\times 2$

$=2\times (27+23)+4\times (12,44+17,56)$

$=2\times 50+4\times 30$

$=100+120=220$

a) 2,34x0,25x0,4

=2,34x(0,25x0,4)

=2,34x0,1

=0,234

b) 12,5x20,06x0,8

=(12,5x0,8)x20,06

=10x20,06

=200,6

#Hoctot

202,01

=1,8 * 1/0,25 +1,8 *1/0.5 +1,8*4

=1,8(1/0,25+1/0.5+4)

=1,8*10

=18

\(25\%\times6,28+\dfrac{1}{4}\times6,28+0,25\times6,28\\ =6,28\times\left(25\%+\dfrac{1}{4}+0,25\right)\\ =6,28\times\left(\dfrac{1}{4}+\dfrac{1}{4}+\dfrac{1}{4}\right)\\ =6,28\times\dfrac{1+1+1}{4}\\ =6,28\times\dfrac{3}{4}\\ =4,71\)

Đổi 25%,1/4=0,25 ta có:

0,25×6,28+0,25×6,28+0,25×6,28

6,28×(0,25+0,25+0,25

6,28×0,75=4,71

\(25\%\times6,28+\dfrac{1}{4}\times6,28+0,25\times6,28\)

\(=\dfrac{1}{4}\times\dfrac{157}{25}+\dfrac{1}{4}\times\dfrac{157}{25}+\dfrac{1}{4}\times\dfrac{157}{25}\)

\(=\dfrac{1}{4}\times\left(\dfrac{157}{25}+\dfrac{157}{25}+\dfrac{157}{25}\right)\)

\(=\dfrac{1}{4}\times\dfrac{157+157+157}{25}\)

\(=\dfrac{1}{4}\times\dfrac{471}{25}\)

\(=\dfrac{1\times471}{4\times25}\)

\(=\dfrac{471}{100}=4,71\)