12340

(1234x5)+(1234x5)=6170+6170=12340

( 1234 x 5 ) + ( 1234 x 5 )

= 6170  + 6170

= 12340

 = (62x5)x(4x25)+ (62x5)x(4x25)

= 310x100+310x100

= 100x(310+310)

= 62000

mình nha bạn

\(1234\times25+74\times1234+1234\)

\(=1234\times\left(25+74+1\right)\)

\(=1234\times100\)

\(=123400\)

4 × 125 × 25 × 8

= (4 × 25) × (125 × 8)

= 100 × 1000

= 100 000

2 × 8 × 50 × 25 × 125

= (2 × 50) × (8 × 125) × 25

= 100 × 1000 × 125

= 12 500 000

2 × 3 × 4 × 5 × 50 × 25

= (2 × 50) × (4 × 25) × (3 × 5)

= 100 × 100 × 15

= 150 000

25 × 20 × 125 × 8 - 8 × 20 × 5 × 125

= 8 × 125 × 20 × (25 - 5)

= 1000 × 20 × 20

= 400 000

- (25 x 4) x (125 x8)=100 x 1000 =100000

- (50 x 2) x (8 x 125) x 25=100 x 1000 x 25 =2500000

- (2 x 50 ) x (4 x 25) x (3 x5)=100 x 100 x 15=150000

- 25 x 20 x125 x 8 - 5

= (20 x 5) x (125 x 8) -25=100 x 1000 -5 =100000 - 5 =99995

4 *125*25*8

=4*25*125*8

=100*1000

=100000

2*8*50*25*125

=2*50*8*125*25

=100*1000*25

=2500000

2*3*4*5*50*25

=2*50*4*25*3*5

=100*100*15

=150000

25*20*125*8-8*20*5*125

=25*4*5*125*8-8*125*20*5

=100*1000*5-1000*100

=500000-100000

=400000

=

        (x+40)x25=2000

=>    x+40=2000:25

=>    x+40=80

=>    x=80-40

=>   x=40

Vậy x=40

      (x-10)x5=100-20x4

=>  (x-10)x5=100-80

=>  (x-10)x5=20

=>   x-10=20:5

=>   x-10=4

=>   x=4+10

=>   x=14

Vậy x=14

      x:2x36=540

=>  x:2=540:36

=>  x:2=15

=>  x=15x2

=>  x=30  

Vậy x=30

      (72x135+9x28x15):25-3500:25

=    (72x135+135x28):25-3500:25

=     135x(72+28):25-3500:25

=     135x100:25-3500:25

=     13500:25-3500:25

=     (13500-3500):25

=     10000:25

=      400

Ai cùng đáp án thì tk và kb vs mk nha !!! Mk cảm ơn nhìu >.<

(x+40) nhân 25= 2000

(x+40)= 2000: 25

x+40= 80

x=80-40

x= 40

(x-10) nhân 5= 100- 20 nhân 4

(x-10) nhân 5= 20

(x-10) =20:5

x-10= 4

x=4+10

x=14

x:2x 36=540

x:2= 540:36

x:2=15

x= 15x 2

x= 30

(72x 135+ 9x 28x 15) : 25- 3500: 25

(72x 135+ 135x 28): 25- 3500:25

((72+28) x135): 25-3500: 25

100x 135: 25- 3500:25

13500: 25- 3500: 25

( 13500-3500) : 25

10000: 25

400

nha bn

36 . x ( x + 10 )  = 540

1234 + 1234 + 1234 x 3 =1234 x 5 = 6170

12345 - 7000 - 5345 = 12345 - (7000 + 5345) = 12345 - 12345 = 0

2 x ( 5678 x 2 + 5678 x 3 + 5678 x 5) = 2 x ( 5678 x 10 ) = 2 x 56780 = 113560

k mình nhe !

a) \(\frac{10}{11}\cdot4\frac{2}{5}\)

= \(\frac{10}{11}\cdot\frac{22}{5}\)

= \(\frac{5\cdot2}{11}\cdot\frac{11\cdot2}{5}\)

= 2 . 2

= 4

b) 2015 - \(\frac{4}{5}\)x 25%

= 2015 - \(\frac{4}{5}\)x \(\frac{1}{4}\)

= 2015 - \(\frac{1}{5}\)

= \(\frac{10074}{5}\)

ket qua = 10074 phan 5

đổi 25% =0,25

=0,25x0.8+0,6-0.8+2010

=0,2+0,6-0,8+2010

=0.8-0,8+2010

=0+2010

=2010

25%.4/5+3/5-0,8+2010

= 0,25.0,8-0,8+2010

=0,2+2010,8

=2011

dấu chấm là dấu nhân nha bạn

mình ghi thiếu xin lỗi nha