C =[125.(73-75)]:(-25)2

=125.(-2):(-25).2

=-250:(-50)

=5

E=125.9.(-4).(-8).25.7

=125.(-8).25.(-4).7.9

=-1000.(-100).63

=6300000

C = ( 125 . 73 - 125 . 75 ) : ( -50)

C = 125 .( -2 ) : (-50)

C = -250 : -50

C =  50

G = ( -3 )²+( -5)³: l -5 l

G = 9 + ( -125) : 5

G = 9 + ( -25 )

G= ( -16 )

E = 125 .9.*( -4 ) . ( -8) .25.7

E = 25.5 .( -4 ) .9 .2. ( -4 ) .25 .7

E =( -100 ).10.( -100).63

E = 10000.630

E = 630000

**** mha

\(\infty\)

a) ( - 125 ) . (+ 25 ) . ( - 32 ) . ( - 14)

= [( - 125 ) . ( - 32 )] . [ 25 . ( -14 )]

= 4000 . ( - 350 )

= - 1 400 000

b) ( - 2 )³ . ( - 25 )  . ( +5) . ( - 4 )

= ( -8) . ( -25) . 5 . ( - 4 )

= [( - 8 ) . 5 ] . [( - 25 . ( - 4 )]

= ( - 40 ) . 100

= - 4000

\(\left(-125\right).25.\left(-32\right).\left(-14\right)\)

\(=\left(-125\right).25.\left(-8\right).4.\left(-14\right)\)

\(=\left[\left(-125\right).\left(-8\right)\right].\left(25.4\right).\left(-14\right)\)

\(=1000.100.\left(-14\right)\)

\(=-1400000\)

a: \(2\cdot25\cdot4\cdot50\)

\(=\left(2\cdot50\right)\cdot\left(25\cdot4\right)\)

\(=100\cdot100=10000\)

b: \(\left(-125\right)\cdot5\cdot\left(-16\right)\cdot\left(-8\right)\)

\(=-125\cdot5\cdot16\cdot8\)

\(=-\left(125\cdot8\right)\cdot\left(5\cdot16\right)\)

\(=-80\cdot1000=-80000\)

c: \(5^2\cdot3^3\cdot2\)

\(=25\cdot27\cdot2\)

\(=\left(25\cdot2\right)\cdot27=27\cdot50=1350\)

d: \(\left(-4\right)\cdot3^2\left(-5\right)^3\)

\(=\left(-4\right)\cdot\left(-125\right)\cdot9\)

\(=500\cdot9=4500\)

đéo biết

( -7 ) . ( - 70 + 58 ) - ( - 13 ) . ( - 19 + 39 )                                                      ( -79 ) - ( -81 ) - 72 -(-8) . (-5)

(-75 ) . ( -3 ) - (-41 + 51 ) . (-6)                                                                         ( -6 + 13 ) . ( -2 )² + ( -16 ) . (-58 + 68 )

B3:

a. =-1250000

b. =-20000

c. =0

d. =-24000

B4:

a. =-4100

b. =-2700

c. =400

d. =1007

(-5).8.(-2).(-125)

=[(-5).(-2)].[8.(-125)]

=10.(-1000)

=-10000