(7.5 x 18.3 + 26.4 x 18.3)x(47x11-47x100x0.1-47)

=(7.5x18.3+26.4x18.3)x(47x11-47x10-47)

=(7.5x18.3+26.4x18.3)x47x(11-10-1)

=(7.5x18.3+26.4x18.3)x47x0

=(7.5x18.3+26.3x18.3)x0

=0

Cac ban giup Minh nha.

6954 + 7123 + 9816 - ( 816 - 123 - 954 )

Dang tính nhanh nhe

( 23 + 47) + (11 + 49) = 50 + 50 = 100

(4. 25) . (7 . 11) = 100 . 77 = 7700

23 + 47 + 11 + 49

=( 23 + 47 ) + (11+49)

= 70+60

=130

4.7.11.25

= (4.25) . (7.11)

=100 . 77

= 7700

k mình nha bn

\(23+47+11+49\)

\(=\left(23+47\right)+\left(11+49\right)\)

\(=70+60\)

\(=130\)

\(4.7.11.25\)

\(=\left(4.25\right).\left(7.11\right)\)

\(=100.77\)

\(=7700\)

23+47+11+49

=(23+47)+(11+49)

=    70    +   60

=          130

4.7.11.25

=(4.25).(7.11)

=  100 .  77

=     7700

5.9.3.2

=(5.2).(3.9)

=   10.  27

=     270

23+47+11+49 = 70 + 60 = 130

4.7.11.25 = 4 . 25 . 7 . 11 = 100 x 77 = 7700

5.9.3.2 = 5 x 2 x 3 x 2 = 10 x 6 = 60 

\(23+47+11+49\)

\(=\left(23+47\right)+\left(11+49\right)\)

\(=70+60\)

\(=130\)

\(4x7x11x25\)

\(=\left(4x25\right)x\left(7x11\right)\)

\(=100x77\)

\(=7700\)

\(5x9x3x2\)

\(=\left(5x2\right)x\left(9x3\right)\)

\(=10x27\)

\(=270\)

K mình nha mình nhanh nhất đó!

a,Ta có:47*11-4700*0,1-47=47*(11-0,1*100-1)=0

=>(7,5*18,3+26,4*18,3)*(47*11-4700*0,1-47)=0

b, (2009*0,45+2009*0,55)+(9,91*36+9,91*64)=2009*(0,45+0,55)+9,91*(36+64)=2009*1+9,91*100=2009+991=3000

căm ơn bạn mình đung rồi hihi

https://www.youtube.com/watch?v=cFZDEMTQQCs

Lay (59/18 + 46/9) + (75/14 + 15/7) + (5/2 + 47/18)

De et a

47+58+83-29-17-53

= (47 - 17) + ( 83 - 53 ) + ( 58 - 29 )

=    30        +     30        +     29 

=            60     +     29 

=                89

co tien ko ban

\(\dfrac{1}{3}+\dfrac{6}{5}-\dfrac{1}{5}+\dfrac{2}{3}=2\)

1/3+6/5−1/5+2/3=2

15,42 x 139,2- 15,42 x 129,2 = 15,42 x (139,2 - 129,2 )

                                               = 15,42 x 100

                                               = 1542

15,42 x 139,2- 15,42 x 129,2

=15,42x(139,2-129,2)

=15,42x10

=154,2