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d) ( - 15 ) - 23 + ( - 85 ) - 77
= ( - 15 - 85 ) - ( 23 + 77 )
= - 100 - 100
= - 200
e) ( 123 - 37 ) - 123
= ( 123 - 123 ) - 37
= 0 - 37
= - 37
f) ( - 224 ) - ( 34 - 224 )
= ( - 224 + 224 ) - 34
= 0 - 34
= - 34
g) 126 - ( 126 - 33 )
= ( 126 - 126 ) - 33
= 0 - 33
= - 33
h) ( - 53 - 23 ) - ( 567 - 53 )
= ( - 53 + 53 ) + ( - 23 - 567 )
= 0 - 590
= - 590
d) ( - 15 ) - 23 + ( - 85 ) - 77
= ( - 15 - 85 ) - ( 23 + 77 )
= - 100 - 100
= - 200
e) ( 123 - 37 ) - 123
= ( 123 - 123 ) - 37
= 0 - 37
= - 37
f) ( - 224 ) - ( 34 - 224 )
= ( - 224 + 224 ) - 34
= 0 - 34
= - 34
g) 126 - ( 126 - 33 )
= ( 126 - 126 ) - 33
= 0 - 33
= - 33
h) ( - 53 - 23 ) - ( 567 - 53 )
= ( - 53 + 53 ) + ( - 23 - 567 )
= 0 - 590
= - 590
a) (123 - 37) -123 -123 - 37 -123 = (123 -123) - 37 = -37.
b) (-224) - (34 - 224) = -224 - 34 + 224 - (-224 + 224) - 34 = -34.
c) 126 - (126 - 33) = 126 -126 + 33 = 33.
d) (-53 - 23) - (567 - 53) - -53 - 23 - 567 + 53 = -590
a) (123 - 37) -123 -123 - 37 -123 = (123 -123) - 37 = -37.
b) (-224) - (34 - 224) = -224 - 34 + 224 - (-224 + 224) - 34 = -34.
c) 126 - (126 - 33) = 126 -126 + 33 = 33.
d) (-53 - 23) - (567 - 53) - -53 - 23 - 567 + 53 = -590
d) ( - 15 ) - 23 + ( - 85 ) - 77
= ( - 15 - 85 ) - ( 23 + 77 )
= - 100 - 100
= - 200
e) ( 123 - 37 ) - 123
= ( 123 - 123 ) - 37
= 0 - 37
= - 37
f) ( - 224 ) - ( 34 - 224 )
= ( - 224 + 224 ) - 34
= 0 - 34
= - 34
g) 126 - ( 126 - 33 )
= ( 126 - 126 ) - 33
= 0 - 33
= - 33
h) ( - 53 - 23 ) - ( 567 - 53 )
= ( - 53 + 53 ) + ( - 23 - 567 )
= 0 - 590
= - 590
tui chỉ viết bài làm thôiii
d
-15+(-85)-23-77=100-100=0
e
123-37-123=123-123-37=-37
g
126-126+33=33
f
-224-34+224=-224+224-34=-34
h
-53-23-567+53=-53+53-23-567=-23-567=-590
a) -(12+21-23)-(23-21+10)
=-12-21+23-23+21-12=-12-12=-24
b)(57-725)-(605-53)
=57-725-605+53=-1220
c)(55+45+45)-(15-55+45)
=55+45+45-15+55-45=110+45-15=140
-(12+21-23)-(23-21+10)
=-12-21+23-23+21-10
=(21-21)+(23-23)-(12+10)
=0+0-22=-22
(57-725)-(605-53)
=57-725-605+53
=(57+53)-(725+605)
=110-1330
=-1220
(55+45+45)- (15-55+45)
=55+45+45-15+55-45
=(45+55)+(55-15)+(45-45)
=100+40+0=140
a/ =15+37+52-37-17
=(15+52)-17+(37-37)
=67-17+0
=50
b/=38-42+14-25+27+15
=-4+14+27-25+15
=10+27-40
=37-40
=-3
c/=-21+32+12-32
=-21+12+32-32
=11+0
=11
d/=-12-21+23-23+21-10
=-33+0+11
=-22
e/=57-725-605+53
=-668-605+53
=-1273+53
=-1220
f/=55+45+15-15+55-45
=55+55+45-45+15-15
=110+0+0
=110
c, 126 - (126 - 33)=126-126+33=33
d, (-53 - 23) - (567 - 53) =-76-567+53=-590
e, 145 - (23 - 45) - (-23 - 10) =145+22+33=200
126 - ( 126 -33) = 126 -126 + 33 = 33
(-53-23)-(567-53)= -76 -567 + 53 = -590
145 - ( 23 -45) -( -23 -10) = 145 -23 + 45 +23 + 10= 200