\(\dfrac{1}{4}\) : 0,25 - \(\dfrac{1}{8}\) : 0,125 + \(\dfrac{1}{2}\) : 0,5 - 1

= 0,25 x 4 - 0,125 x 8 + 0,5 x 2 - 1

= 1 - 1 + 1 - 1

= 0 + 1 - 1

= 1 - 1

= 0

A = \(\dfrac{1}{4}\) : 0,25 - \(\dfrac{1}{8}\): 0,125 + \(\dfrac{1}{2}\): 0,5 - 1

A = \(\dfrac{1}{4}\) x 4 - \(\dfrac{1}{8}\) x 8 + \(\dfrac{1}{2}\) x 2 - 1

A = 1 - 1 + 1  - 1

A =  (1 - 1) + (1 - 1)

A = 0 

\(\dfrac{1}{4}:0,25-\dfrac{1}{8}:0,125+\dfrac{1}{2}:0,5-\dfrac{1}{16}:0,0625\\ =0,25:0,25-0,125:0,125+0,5:0,5-0,0625:0,0625\\ =1-1+1-1\\ =0+1-1\\ =1-1\\ =0\)

1/4:1/4-1/8:1/8+1/2:1/2-1/16:1/16

=1-1+1-1 

=0

a, 

2 x 4 x 8 x 0,5 x 0,125 x 0,25 x (0,4321 + 0,5679)

= 2 x 4 x 8 : 2 : 8 : 4 x 1

= (2 : 2) x (4 : 4) x (8 : 8) x 1

= 1 x 1 x 1 x 1

= 1

đề nó bị dính nhau quá bn!

\(a)101\times0,75-0,75\)

\(=0,75\times(101-1)\)

\(=0,75\times100=75\)

___________________________________________

`b)10:0,5+4:0,25+8:0,125`

\(=10\times2+4\times4+8\times8\)

\(=5\times4+4\times4+4\times16\)

\(=4\times(5+4+16)\)

\(=4\times25=100\)

$a)101\times 0,75-0,75$

$=0,75\times (101-1)$

$=0,75\times 100=75$

___________________________________________

$b)10:0,5+4:0,25+8:0,125$

$=10\times 2+4\times 4+8\times 8$

$=5\times 4+4\times 4+4\times 16$

$=4\times (5+4+16)$

$=4\times 25=100$

kho nhi

to lam duoc nhung ko chac la dung! nen to ko dang len dau

so dang len nhung sai thi cau lai chui to

 Ko sao đâu

Sai sửa được với lại đây là ôn thi nếu sai cô sẽ chỉ lại

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

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

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

\(=12,5\times10\)

\(=125\)

_HT_

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

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

\(=12,5.10=125\)

125 nhé bạn

= 12,5 x 2 + 12,5 x 4 + 12,5 x 8 - 12,5 x 4

= 12,5 x (2+4+8-4)

= 12,5 x     10

=     125