\(49\dfrac{8}{23}-\left(5\dfrac{7}{32}+14\dfrac{8}{23}\right)=49\dfrac{8}{23}-5\dfrac{7}{32}-14\dfrac{8}{23}=\left(49\dfrac{8}{23}-14\dfrac{8}{23}\right)-5\dfrac{7}{32}=35-5\dfrac{7}{32}=\dfrac{953}{32}\)

kết quả là 16 nha bạn

49. (-23 + 2.x) = (-49).(-23 + 14)

49. (-23 + 2.x) = (-49). (-9)

49. (-23 + 2.x) = 441

     -23 + 2.x = 441 : 49

     -23 + 2.x = 9

             2.x = 9 - (-23)

            2.x = 32

              x = 32 : 2

              x = 16

giải

49/8/23-(5/7/32+14/8/23)

=49/8/23-5/7/32-14/8/23

=(49/8/23-14/8/23)-5/7/32

=35-5/7/32

=953/32

1: Ta có: \(2155-\left(174+2155\right)+\left(-68+174\right)\)

\(=2155-174-2155-68+174\)

=-68

2) Ta có: \(-25\cdot72+25\cdot21-49\cdot25\)

\(=-25\cdot\left(72-21+49\right)\)

\(=-25\cdot100=-2500\)

49\(\frac{8}{23}\) - (5\(\frac{7}{32}\) + 14\(\frac{8}{23}\) )

= \(\frac{1135}{23}\) - (\(\frac{167}{32}\) +\(\frac{330}{23}\) )

= \(\frac{1135}{23}\) - \(\frac{14401}{736}\) 

=\(\frac{953}{32}\)

\(49\frac{8}{23}-\left(5\frac{7}{32}+14\frac{8}{23}\right)\)

\(=\frac{1135}{23}\left(\frac{135}{32}+\frac{330}{23}\right)\)

\(=\frac{1135}{23}.\frac{13665}{736}\)

\(=916,2201678\)

a/57x23+23x44-23

57x23+23x44-23x1

=23x(57+44-1)

=23x100

=2300

b

a) 57 . 23 + 23 . 44 - 23

= 57 . 23 + 23 . 44 - 23 . 1

= ( 57 + 44 - 1 ) . 23

= 100 . 23

= 2300

b) 1672 - [ 49 + ( 13 - 7 )³ ]

= 1672 - [ 49 + 6³ ]

= 1672 - [ 49 + 216 ]

= 1672 - 265

= 1407

c) 50 : { 2 . [ 52 - ( 3 . 5 - 2² . 3 )³ ] }

= 50 : { 2 . [ 52 - ( 3 . 5 - 4 . 3 )³ ] }

= 50 : { 2 . [ 52 - ( 3 . 1 )³ ] }

= 50 : { 2 . [ 52 - 27 ] }

= 50 : { 2 . 25 }

= 50 : 50

= 1

d) -2014 + (-999) + 14 + (-2001)

= ( -2014 + 14 ) + [ (-999) + (-2001) ]

= (-2000) + (-3000)

= -5000

Học tốt nhé bạn !