a)

(-4) . 32 . (-25) . 11

= (-4).(-25) . (32.11)

= 100 . 352

= 35200

b)

-86 . 46 - 46 . 27 + 46 . 23

= 46. ( -86 - 27 + 23)

= 46. (-90) = -4140

Chúc em học tốt!!!

a)

(-4) . 32 . (-25) . 11

= (-4).(-25) . (32.11)

= 100 . 352

= 35200

P/s tham khảo nha

647-[y:(46+13+54)]=54-32+46

=647-[ y:( 46+13+54) ]=68

=647-[y:113]=68

=647-68

=579

=579x113

=65427

60

45-58+(-45)+(+58)-3=45-58-45+58-3=(45-45)+(58-58)-3=-3

(-57)-(-12)+3-(-57)=-57+12+3+57=(-57+57)+12+3=15

-(-24)-(-30)+(-24)-30+8=24+30-24-30+8=(24-24)+(30-30)+8=8

-(-12)+(+19)-(+12)+8-19=12+19-12+8-19=(12-12)+(19-19)+8=8

47-(-53)+(-47)-(+53)=47+53-47-53=(47-47)+(53-53)=0

-(+28)+32-(-28)+(-34)=-28+32+28-34=(-28+28)-(34-32)=-2

15-(+72)+(-15)+(+72)=15-72-15+72=(15-15)+(72-72)=0

20-(+46)+(-25)-(-46)=20-46-25+46=(20-25)+(46-46)=-5

28-(-32)+(-28)-32+5=28+32-28-32+5=(28-28)+(32-32)+5=5

-75+(-49)+(+75)+49-12=-75-49+75+49-12=(-75+75)+(49-49)-12=-12

\(...=45-58-45+58-3=-3\)

\(...=-57+12+3+57=15\)

\(...=24+30-24-30+8=8\)

\(...=12+19-12+8-19=8\)

\(...=47+53-47-53=0\)

\(...=-28+32+28-34=-2\)

\(...=15-72-15+72=0\)

\(...=20-46-25+46=-5\)

\(=...28+32-28-32+5=5\)

\(...=-75-49+75+49-12=-12\)

-x+(-32)+(-46)=-84

-x+(-32)=(-84)-(-46)

-x+(-32)=-38

-x=(-38)-(-32)

-x=-6

=>x=6

tick nha

-x-32-46=-84

-x-78=-84

-x=-84+78

-x=-6

x=6

-x + (-32) + (-46) = -84

-x - 32 - 46          = -84

-x - 78                 = -84

-x                        = -84 - 76

-x                        = -6

-x + (-32) + (-46) = -84

-x + (-32)             = -84 - (-46)

-x + (-32)             = -38

-x                         = -38 - (-32)

-x                         = -6

\(\Rightarrow\)x = 6

\(\frac{15}{26}+\frac{x}{13}=\frac{46}{32}\)

\(\frac{x}{13}=\frac{46}{32}-\frac{15}{26}\)

\(\frac{x}{13}=\frac{1196}{832}-\frac{480}{832}\)

\(\frac{x}{13}=\frac{716}{832}\)

\(\frac{x}{13}=\frac{179}{208}\)

\(\frac{x}{13.16}=\frac{179}{208}\)

\(\frac{x}{208}=\frac{179}{208}\)

\(x=179\)

chú ý: dấu "." là dấu nhân

ko mình nha

a. x - 108 = -14

x = 94

b. 84 + x = -80

x = -164

cứu mình điiiiiiiiiiiiiiiiiiiiiiiiiiiiii mọi người!