0,025 x 628 + 36,2 x 25% + \(\frac{1}{4}\)

= 0,025 x 10 x 62,8 + 36,2 x \(\frac{1}{4}\)+ \(\frac{1}{4}\)

= \(\frac{1}{4}\) x 62,8 + 36,2 x \(\frac{1}{4}\)+ \(\frac{1}{4}\)

= \(\frac{1}{4}\)x ( 62,8 + 36,2 + 1 )

= \(\frac{1}{4}\)x 100

= 25

24,75 là đ/s

mong đc k

câu này là 24,75 nhé bạn

nếu đúng thì cho 1 k

học tốt

63A+51 PHẦN 400

A) 2,5 x 9,7x4

=( 2,5 x 4 )x 9,7

= 10 x 9,7

= 97

B) 1,25X 0,25 X4 X8

=( 1,25 X 8 ) X (0,25 X 8 )

= 10 X 1

= 10

C)12,5 x 0,8 x 10

=(12,5 x 0,8)x10

= 100 x 10

=1000

D) 0,025 x 10 x 4

= (0,025x 10)x4

= 0,25 x 4

=     1

CHÚC BN HỌC TỐT !

3,95 x 1/4 + 3,95 x 9,85 - 3,95 : 10

= 3,95 x 0,25 + 3,95 x 9,85 - 3,95 x 0,1

= 3,95 x ( 0,25 + 9,85 - 0,1 )

= 3,95 x 10

= 39,5

1/2* x+2/3=9/2

1/2 * x = 9/2 - 2/3 

1/2 * x= 23/6

x= 23/6 : 1/2

x= 23/6 x 2= 23/3

___

1/2*x-1/3=2/3

1/2*x = 2/3 + 1/3

1/2 * x= 1

x= 1: 1/2 

x= 2

____

1/4+3/4:x=3

3/4 : x = 3 - 1/4

3/4 : x= 11/4

x= 11/4 : 3/4

x= 11/3

\(\dfrac{1}{2}\)\(\times\)\(x\) + \(\dfrac{2}{3}\) = \(\dfrac{9}{2}\)

\(\dfrac{1}{2}\)\(\times\)\(x\)        = \(\dfrac{9}{2}\) - \(\dfrac{2}{3}\)

\(\dfrac{1}{2}\)\(\times\)\(x\)       = \(\dfrac{23}{6}\)

      \(x\)       = \(\dfrac{23}{6}\):\(\dfrac{1}{2}\)

      \(x\)      = \(\dfrac{23}{3}\) 

\(\dfrac{1}{2}\)\(\times\)\(x\) - \(\dfrac{1}{3}\) = \(\dfrac{2}{3}\) 

\(\dfrac{1}{2}\)\(\times\)\(x\)       = \(\dfrac{2}{3}\) + \(\dfrac{1}{3}\)

\(\dfrac{1}{2}\times\)\(x\)      =  1

     \(x\)       = 1 : \(\dfrac{1}{2}\)

   \(x\)         = 2

\(\dfrac{1}{4}\) + \(\dfrac{3}{4}\): \(x\) = 3

          \(\dfrac{3}{4}\): \(x\) = 3 - \(\dfrac{1}{4}\) 

          \(\dfrac{3}{4}\):\(x\) = \(\dfrac{11}{4}\)

              \(x\) = \(\dfrac{3}{4}\): \(\dfrac{11}{4}\)

             \(x\) = \(\dfrac{3}{11}\)

1,23 x 99 + 1,23 x 25% + 1,23 x 3/4

= 1,23 x 99 + 1,23 x 1/4 + 1,23 x 3/4

= 1,23 x (99 + 1/4 + 3/4)

= 1,23 x 100

= 123

1,23 x 99 + 1,23 x 25% + 1,23 x 3/4

= 1,23 x 99 + 1,23 x 0,25 + 1,23 x 0,75

= 1,23 x (99 + 0,25 + 0,75)

= 1,23 x 100

= 123

Chúc bạn học tốt.

😁😁😁

3* X + 2*X +x = 36,2

=> 6 x = 36,2

=>x = 181/30

\(3\cdot x+2\cdot x+x=36.2\)

\(\left(3+2+1\right)\cdot x=36.2\)

\(6\cdot x=36.2\)

\(x=36.2:6\)

\(x=\frac{181}{30}\)