(-25).(75-45)-75.(45-25)
(-25).(75 - 45) - 75.(45 - 25)
= [(-25).75 - (-25).45] - (75.45 - 75.25)
= (-25).75 + 25.45 - 75.45 + 75.25
= [(-25).75 + 75.25) - (75.45 - 25.45)
= 0 - 45.(75 - 25)
= -45.50
= -2250
(-25) × (75-45) - 75×(45×25)
\(\left(-25\right)\times\left(75-45\right)-75\times\left(45\times25\right)\)\(=\) \(\left(-25\right)\times30-75\times1125\)
\(=\left(-750\right)-84375\)
\(=-85125\)
= (- 25) . 30 - 75 . 1125
= -750 - 84375
= -82125
Ủng hộ mik nha
(-25).(75-45)-75.(45-25)
`(-25).(75-45)-75.(45-25)`
`=-25.30-75.20`
`=-750-1500`
`=-2250`
(-25).(75-45)-75.(45-25)
= (-25) . 75 - (-25) . 45 - 75 . 45 - 75 . 25
= [(-25) . 75 - 75 . 25] - 45 . [(-25) - 75]
= 0 - 45 . (-100)
= 0 - (-4500)
= 4500
Tính hợp lí
19.25-(-19).75
(-25).(75-45)-75.(45-25)
19.25-(-19).75
= 19.25-19.(-75)
= 19 . [ 25-( -75 ) ]
=19.100 = 1900
19.25-(-19).75
= 19.25 +19,75
= 19(25+75)
=19 .100
= 1900
(-25).(75-45)-75.(45-25)
= (-25).(75-45) - [(-25).(75-45).-2]
=-750-(-750).-2
= -2250
TÍNH nhanh a ) ( - 25 ) × ( 75 - 45 ) - 75 × ( 45 - 25 )
( - 25 ) . ( 75 - 45 ) - 75 . ( 45 - 25 )
= ( - 25 ) . 75 - ( - 25 ) . 45 - 75 . 45 - ( - 75 ) . 25
= ( - 25 ) . 45 - 75 . 45
= [ ( - 25 ) + 75 ] . 45
= 50 . 45
= 2250
(-25) . (75 - 45) - 75 . ( 45 -25 )
= -25 . 75 - ( -25 ) . 45 - 75 . 45 - ( -75 ) . 25
= -25 . 75 + 25 . 45 - 75 . 45 + 75 . 25
= 75 . ( -25 + 25 ) + 45 . ( 25 - 75 )
= 75 . 0 + 45 . -50
= 0 + ( -2250 )
= -2250
(-25) . (75 - 45) - 75 . ( 45 -25 )
= -25 . 75 - ( -25 ) . 45 - 75 . 45 - ( -75 ) . 25
= -25 . 75 + 25 . 45 - 75 . 45 + 75 . 25
= 75 . ( -25 + 25 ) + 45 . ( 25 - 75 )
= 75 . 0 + 45 . -50
= 0 + ( -2250 )
= -2250
Bài 2: Tính
b: (-25).(75-45)- 75.(45-25)
\(\left(-25\right).\left(75-45\right)-75.\left(45-25\right)\\ =\left(-25\right).30-75.20\\ =-750-1500\\ =-2250\)
=-25*75+25*45-75*45+75*25
=25*45-75*45
=45*(-50)
=-2250
Tính bằng cách hợp lí:
a, 8.(-2).4.(-2020).(-125).(-5).25
b, (-25).(75 - 45) - 75.(45 - 25)
tính hợp lý
a,(-31)+(-95)+131+(-5)=
b,(-25).(75-45)-75.(45-25)=
a, ( -31 ) + ( -95 ) + 131 + ( -5 )
= <( -31 ) + 131> + <( -95 ) + ( -5 )>
= 100 + ( -100 )
= 0
Dấu < > là ngoặc vuông nha
15+25+35+45+55+65+75+85++95=
(-25).(75-45)-75.(45-25)
Tính nhanh nếu có thể.
GIÚP MÌNH NHA MỌI NGƯỜI.
(-25).(75-45)-75.(45-25)
= -25 . 75 - ( -25 ) . 45 - 75 . 45 - ( -75 ) . 25
= -25 . 75 + 25 . 45 - 75 . 45 + 75 . 25
= 75 . ( -25 + 25 ) + 45 . ( 25 - 75 )
= 75 . 0 + 45 . -50
= 0 + ( -2250 )
= -2250
~Xong rồi nhé bạn~
Tính hợp lí :
a) (-37-17).(-9)+35.(-9-11)
b) (-25)(75-45)-75(45-25)
