\(=\left(32\cdot57+18\cdot32\right)+75\cdot68\\ =32\cdot\left(57+18\right)+75\cdot68\\ =32\cdot75+75\cdot68\\ =75\cdot\left(32+68\right)=75\cdot100=7500\)

32.57+75.68+18.32 

= 32. (57+18) + 75.68 

= 32. 75 + 75. 68

= (32+68) .75

= 100 .75 

= 7500 

-75x(18-65)-65x(75-18) = -75x(-47) - 65x57

=3525-3705=-180. 

k nha. thnk 

= (-75) x 18 - (-75) x 65  - 65 x 75 - 65 x 18

= (-75) x 18 - 65 x 18 - (-75) x 65 - 65 x 75

= (-75 - 65) x 18 - 65 x (-75 - 75)

= -140 x 18 - 65 x (-150)

= 7230

143 - ( - 57 ) + 32 - ( 12 + 88 )

= 143 + 57 + 32 - 12 - 88

= ( 143 + 57 ) + ( 32 - 12 - 88 )
= 200 + ( 20 -88 )

= 200 - 42

= 158

!! K chắc lắm

@@ Học tốt

@Chiyuki Fujito.

Chi tiết hay chỉ cần đáp án thôi bn?

làm được mik k cho :)

hu hu :((

32 . 75 + 68 . 84 + 65 . 32 + 68 . 56

= 32 . ( 75 + 65 ) + 68 . ( 84 + 56 )

= 32 . 140 + 68 . 140

= 140 . ( 32 + 68 )

= 140 . 100

= 14000

32 x 75 + 68 x 84 + 65 x 32 + 68 x 56

= ( 32 x 75 ) + ( 65 x 32 ) + ( 68 x 84 ) + ( 68 x 56 )

= 32 x ( 75 + 65 ) + 68 x ( 84 +56 )

= 32 x 140 + 68 x 140

= 140 x ( 32 + 68 ) 

= 140 x 100

= 14000

a: \(-177-\left\lbrack89+\left(-177\right)+75\right\rbrack-\left(-25\right)\)

=-177-[89-177+75]+25

=-177-89+177-75+25

=-89-50

=-139

b: \(2\cdot\left\lbrack16+\left(-12\right)-5\right\rbrack+\left(-32\right)-\left(-10\right)\)

\(=2\cdot\left\lbrack16-17\right\rbrack-32+10\)

=2*(-1)-32+10

=-34+10

=-24

c: \(56\cdot53-\left\lbrack57+\left(-75\right)-\left(-9\right)\cdot2\right\rbrack\)

=2968-[57-75+18]

=2968

d: \(16\cdot\left(-45\right)+16\cdot34-\left(-16\right)\cdot\left(-89\right)\)

\(=16\left(-45+34\right)-16\cdot89\)

\(=16\left(-11-89\right)=16\cdot\left(-100\right)=-1600\)

e: \(77\cdot18-\left(-77\right)\cdot60+\left(-77\right)\cdot\left(-22\right)\)

\(=77\cdot18+77\cdot60+77\cdot22\)

\(=77\left(18+60+22\right)=77\cdot100=7700\)

3.5²-27:3² +5².4-18:3²

=3 . 25 - 27 : 9 + 25. 4 - 18 : 9

=75 - 3 + 100 - 2

=(75 - 3) + (100 - 2)

=72 + 98

=170

=3.25-27:9+25.4-18:9

=75-3+100-2

=72+100-2

=170

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

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

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

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

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

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

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

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

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

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

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

\(\Rightarrow-5-2x=5^4\\ \Rightarrow2x=-5-625=-630\\ \Rightarrow x=-315\)

`5-10-2x=5^7:5^3`

`=>-5-2x=5^4=625`

`=>2x=-630`

`=>x=-315`