= 339443775

= 176432256

k mik với

Câu hỏi :

23 x 45 x 67 x 89 x 55 = ?

34 x 78 x 99 x 12 x 56  = ?

Trả lời :

23 x 45 x 67 x 89 x 55 = 339443775

34 x 78 x 99 x 12 x 56  = 176432256

Chúc bạn học tốt !

23 x 45 x 67 x 89 x 55 = 339443775

34 x 78 x 99 x 12 x 56  = 176432256

28(29-23) - 29(28-23)

= 812-644-812+667

= 23

(-167).(67-34)-67.(34-167)

= -11189+5678-2278+11189

= 3400

28(29-23) - 29(28-23)

= 812-644-812+667

= 23

(-167).(67-34)-67.(34-167)

= -11189+5678-2278+11189

= 3400

28(29-23) - 29(28-23)

= 812-644-812+667

= 23

(-167).(67-34)-67.(34-167)

= -11189+5678-2278+11189

= 3400

đây nha 

tick cho mk nha

256,23 + 12,56 = 268,79

56,23 + 12,45 = 68,68

89,67 - 23,45 = 66,22

1,23 + 34,67 = 35,9

19,56 + 45,65 = 65,21

kp voi : http://olm/thanhvien/gop123 va mih dj

\(a,-\left(-94\right)+\left(67-x\right):2=\left(-34-14\right)\)

\(94+67-x:2=-48\)

\(161-x:2=-48\)

\(x:2=209\)

\(x=\frac{209}{2}\)

câu c thật ra là : - (- 34 - 23) = - x + 37

a. - (- 94) + (67 - x) : 2 = (- 34 - 14)

<=>94+(67-x):2=-48

<=>67-x:2=142

<=>x:2=-75

<=>x=-150

Vậy x=-150

b. 73 - (- 20 + 37) = x - (57 - 39)

<=>73+20-137=x-18

<=>x-18=-44

<=>x=-26

Vậy x=-26

c. - (- 34 - 23) = x + 37

34+23=x+37

<=>57=x+37

<=>x=20

Vậy x=20

a) 20.(-5)+23.(-30)

=-100+(-690)

=-790

b)(-57).33-67.(-23)

=-1881-(-1541)

=-340

a, (37-17). (-5) +23 . (-13-17)

=20. (-5) +23. (-30)

= -100-690

= -790

b,(-57) . (67-34)-67.(34-57)

=(-57).33-67 .(-23)

= -1881 + 1541

= -340

a, ( 37 - 17 ) . ( -5 ) + 23 . ( -13 - 17 )                              b, ( -57 ) . ( 67 - 34 ) - 67 . (34 -57 )

= 20 . ( -5 ) + 23 . 4                                                          =-57 . 69 + 57 . 34 - 67 . 34 + 67 . 57 

= -100 + (-690 )                                                               = 57 . 34 - 67 . 34

= -790                                                                            = 34 . ( 57 - 67 )

                                                                                     = 34 . ( -10 )

                                                                                    = -340

nho k cho minh nhieu nha

Cách 1:                                                                                               

a) (37 - 17).(-5) + 23.(-13-17)

=     20.(-5) + 23.(-30)

=     (-100) + (-690)

=           -790

b) (-57).(67 - 34) - 67.(34 - 57)

=       (-57).33 - 67.(-23)

=        1881 -   1541

=             340

Cách 2:

a) (37 - 17).(-5) + 23.(-13 - 17)

=   - 37.5 + 17.5 - 23.13 - 23.17

=   (17.5 - 23.17) - (37.5 + 23.13)

=     17.(5 - 23) - (185 + 299)

=     17.(-18) - 484

=         -306 - 484

=              -790

b) (-57).(67 - 34) - 67.(34 - 57)

= -57.67 + 57.34 - 67.34 + 67.57

= (67.57 - 57.67) + (57.34 - 67.34)

=            34.(57 - 67)

=            34.(-10)

=             -340

Tính:

a) (37 - 17) . (-5) +23 . ( -13 - 17)

=20.18.-30

=-10800

b) (-57) . (67-34) - 67 . (34 - 57)

=(-57).33-67.(-23)

=(-1881)-(-1541)

= -340

a) (37 - 17) . (-5) +23 . ( -13 - 17)

= 20 . (-5) +23 . 4

= 100 + 92

= 192

b) (-57) . (67-34) - 67 . (34 - 57)

= (-57) . 33 -67 . (-23)

= -1881 - (-1541)

= -1881 + 1541

= -340