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45 . (-24) +( -10) . (-12)
=45 .2 .(-12) +(-10) . (-12)
= -12(45 . 2 +(-10) )
= -12. 80
= -960
nếu chỗ 51 . 134 là 51 . (-134) thì mk làm đc
(-134) + 51 . (-134) + (-134) . 8
= -134( 1+51+8)
= -134 . 60
= -8040
k cho mk nha
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a)2354-45-2345=2354-2354-45=-45. b)-2009-243+2009=-2009+2009-234+-243. c)16+23+153-16-23=16-16+23-23+153=153.d)134-167+45-134-45=134-134+45-45-167=-167.e)215+43-215-25=215-215+43-25=18.f)-312-327-28+27-312-28-327+27=340-300=40
a, (2354-45)-2354
=2354-45-2354
=(2354-2354)-45
=0-45
=-45
a, ( -2009 ) - ( 234 - 2009 )
b, ( 134 - 167 + 45 ) - ( 134 + 45 )
c, 321 + { -15 + [ 30 + ( -321 ) ]}
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ok men
a, (2354 - 45) - 2354
= 2354 - 45 - 2354 = ( 2354 - 2354 ) - 45 = 0 - 45 = -45
b, (-2009 ) - ( 234 - 2009 )
= (-2009 ) - 234 + 2009 = ( -2009 + 2009 ) -234 = 0- 234 = -234
c, ( 16 + 23 ) + ( 153 - 16 - 23 )
= 16 + 23 + 153 - 16 - 23 = ( 16 - 16 ) + ( 23 - 23 ) + 153 = 0 + ) + 153 = 153
d, (134- 167 + 45 ) - ( 134 + 45 )
= 134 - 167 + 45 - 134 - 45
= ( 134 - 134 ) + ( 45 - 45 ) - 167 = 0 - 0 - 167 = -167
e, 215 + 43 - 215 - 25
= ( 215 - 215 ) + ( 43 - 25 ) = 0 + 18 = 18
f, (-312)- 327 - 28+ 27
= ( -312 - 327 ) - ( 28 - 27 )
= -639 - 1
= -640
a) (2354-45)-2354=2354-45-2354=-45
b) (-2009)-(234-2009)=-2009-234+2009=-234
c) (16+23)+(153-16-23)=16+23+153-16-23=153
d) (134-167+45)-(134+45)=134-167+45-134-45=-167
e) 215+43+(-215)+(-25)=215+43-215-25=18
f) (-312)+(-327)+(-28)+27=-312-327-28+27=-640
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1.
( 120 . 400 ) : ( 60 . 50 . 40 )
= 48000 : ( 300 . 40 )
= 48000 : 120000
= 0,4
134 . 176 + 134 . 42 . 134 . 18
= 134 . ( 176 + 42 + 18 )
= 134 . 236
= 31624
( x + 74 ) - 318 = 200
x + 74 = 200 + 318
x + 74 = 518
x = 518 - 74
x = 444
( x : 25 + 45 ) . 67 = 8911
( x : 70 ) . 67 = 8911
x : 70 = 8911 : 67
x : 70 = 133
x = 133 . 70
x = 9310
Chúc bạn học tốt !
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1: \(=-24\left(45-5\right)=-24\cdot40=-960\)
2: \(=-134\left(1-51+48\right)=-134\cdot\left(-2\right)=268\)
3: \(=124\left(1-52+47\right)=124\cdot\left(-3\right)=-372\)
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(-134)+51×134+(-134)×48
=-1 x 134 + 51 x 134 + 134 x (-48)
= 134 x ( -1 + 51- 48)
= 134 x 2
= 268
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-134 + 51 x 134 + (-134) x 48
= [(-132) + (-134)] + 51 x 134 + 48
= 0 + 51 x 134 + 48
= 0 + 6834 + 48
= 0 + 6882
= 6882
(134 - 167 + 45 ) - (134 + 45 )
= 134 - 167 + 45 - 134 - 45
=(134 - 134 ) + (45 + 45 ) - 167
= 0 + 0 - 167
= 0 - 167
= -167