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

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

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

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

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

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

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

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

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

=5/2

=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

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

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

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

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

$=100+120=220$

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 

\(=25\%+25\%\times38+25\%\times50+25\%\times11\)

\(=25\%\times\left(1+38+50+11\right)=25\%\times100=25\)

\(\dfrac{25}{100}+\dfrac{1}{4}\times38+25\%\times50+0,25\times11\)

\(0,25+0,25\times38+0,25\times50+0,25\times11+1\)

\(0,25\times\left(38+50+11+1\right)\)

\(0,25\times100\)

\(25\)

\(12,5:0,5+12,5:0,25+12,5:0,125-12,5\times4\)

\(=12,5\times2+12,5\times4+12,5\times8-12,5\times4\)

\(=12,5\times\left(2+4+8-4\right)\)

\(=12,5\times10\)

\(=125\)

_HT_

12,5 : 0,5 + 12,5 : 0,25 + 12,5 : 0,125 – 12,5 x 4

\(=12,5\left(2+4+8-4\right)\)

\(=12,5.10=125\)