\(=\left(-\dfrac{28}{33}-\dfrac{5}{33}\right)+\left(-\dfrac{18}{47}-\dfrac{29}{47}\right)=-1-1=-2\)

-33.(32-47)-23.(47-33) = 173 nhé 

kết quả là 173

-33 . ( 32 - 47 ) - 23 . ( 47 - 33 )

= -33 . (-15) -23 . 14 

= 495 -  322 

= 173

Ta có: \(47^5=47^4.47=\overline{...1}.47=\overline{...7}\)

Vậy c/s tận cùng của \(47^5\) bằng 7

Ta có: \(47^5+2021=\overline{...7}+2021=\overline{...8}\)

Mà SCP ko bao giờ có tận cùng là 8

\(\Rightarrow47^5+2021\) ko phải là SCP

Ta có: \(13\cdot\left(-47\right)-53\cdot13\)

\(=13\cdot\left(-47-53\right)\)

\(=13\cdot\left(-100\right)=-1300\)

Ta có: \(27\cdot\left(-67\right)+33\cdot\left(-27\right)\)

\(=27\cdot\left(-67\right)-33\cdot27\)

\(=27\left(-67-33\right)\)

\(=27\cdot\left(-100\right)=-2700\)

Ta có: \(-49\cdot65+36\cdot\left(-49\right)+49\)

\(=-49\cdot65+\left(-49\right)\cdot36+\left(-49\right)\cdot\left(-1\right)\)

\(=-49\cdot\left(65+36-1\right)\)

\(=-49\cdot100=-4900\)

Ta có: \(136\cdot\left(-47\right)+36\cdot47\)

\(=\left(-136\right)\cdot47+36\cdot47\)

\(=47\cdot\left(-136+36\right)\)

\(=47\cdot\left(-100\right)=-4700\)

Ta có: \(\left(-48\right)\cdot72+36\cdot\left(-304\right)\)

\(=-96\cdot36+36\cdot\left(-304\right)\)

\(=36\cdot\left(-96-304\right)\)

\(=36\cdot\left(-400\right)=-14400\)

a, 50-(47+50-18)+(47-18)=50-47-50+18+47-18

                                         =(50-50)+(47-47)+(18-18)

                                         =0+0+0=0

b, 42-56+33-(33+144+42) = 42-56+33-33-144-42

                                         = (42-42)+(33-33)

đến đó mình ko chắc lm nữa, bn tự lm nhé

\(50-\left(47+50-18\right)+\left(47-18\right)\)

\(=50-47-50+18+47-18\)

\(=\left(50-50\right)+\left(47-47\right)+\left(18-18\right)\)

\(=0\)

a ) 50 - 47 +50 -18 +47 -18
= (50+50) - (47 -47) + ( 18+ 18)
=100 - 0 + 36  
=136

b) 42 -56 +33 -33 +144 +42 
= ( 42 - 42) - (33 - 33) + (56 +144)
=0 + 0 + 200
=200 

Hướng dẫn giải:

a) 93 + 39 + 7 = (93 + 7) + 39 = 100 + 39 = 139.

89 + 85 + 11 = (89 + 11) + 85 = 100 + 85 = 185

184 + 66 + 16 = (184 + 16) + 66 = 200 + 66 = 266

b) 23 + 52 + 47 + 98 = (23 + 47) + (52 + 98) = 70 + 150 = 220

16 + 490 + 84 + 10 = (16 + 84) + (490 + 10) = 100 + 500 = 600 

x+(-47)=-33-35

x+(-47)=-68

x=-68-(-47)

x=-21

x+(-47)=-33-35

x+(-47)=-33+(-35)

x+(-47)=-68

x        =-68-(-47)

x        =-68+47

x        =-21

Vậy x=-21

Tick nha

nhiều quá mk phụ bạn chút thôi

a)47*(23+50)-23*(47+50)=47*23+47*50-23*47+23*50=(47*23-23*47)+(47*50+23*50)=(47+23)*50=70*50=3500

b)29*(85-47)+85*(47-29)=29*85-29*47+85*47-85*29=(29*85-85*29)+(85*47-29*47)=(85-29)*47=56*47=2632

c)37*90-37*(-10)=37*[90-(-10)]=37*100=3700

a. 47.[23+50]-23.[47+50]

=47.73-23.97

=3431-2231

=1200

b,29.[85-47]+85.[47-29]

=29.38+85.18

=1102+1520

=-428

c,37.90-37.[-10]

=37.(90-(-10))

=37.100

=3700

d,15.12-3.5.10

=15.12-15.10

=15.(12-10)

=15.2

=30

e,29.[19-13]-19.[29-13]

=29.6-19.16

=174-304

=-130

f,33.[17-5]-17.[33-5]

=33.12-17.32

=396-544

=-148

g,54-6.[17+9]

=54-6.26

=54-156

=-102

h,1000+[-570]+2341+[-430]

=430+2341+(-430)

=(-430+430)+2341

=0+2341

=2341

Ta có:  − 7 15 + − 5 3 + 2 15 ≤ x ≤ 4 7 + 1 + 33 − 21 ⇔ − 7 − 25 + 2 15 ≤ x ≤ 12 + 21 − 33 21 ⇔ − 2 ≤ x ≤ 0 mà  x ∈ ℤ ⇒ x ∈ − 2 ; − 1 ; 0