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\(\left|-19\right|+\left(-29\right)+\left(-43\right)+\left|71\right|\)
\(=19+\left(-29\right)+\left(-43\right)+71\)
\(=\left(-10\right)+\left(-43\right)+71\)
\(=\left(-53\right)+71\)
\(=18\)
\(\left|-33\right|+\left(-73\right)+\left(-41\right)+\left|22\right|\)
\(=33+\left(-73\right)+\left(-41\right)+22\)
\(=\left(-40\right)+\left(-41\right)+22\)
\(=\left(-81\right)+22\)
\(=-59\)
\(\left|-25\right|+\left(-75\right)+\left(-17\right)+\left|99\right|\)
\(=25+\left(-75\right)+\left(-17\right)+99\)
\(=\left(-50\right)+\left(-17\right)+99\)
\(=\left(-67\right)+99\)
\(=32\)
\(\left|-22\right|+\left(-92\right)+\left(-56\right)+22\)
\(=22+\left(-92\right)+\left(-56\right)+22\)
\(=\left(-70\right)+\left(-56\right)+22\)
\(=\left(-126\right)+22\)
\(=-104\)
Phần dưới bạn làm nốt nhé!
\(\left(-23\right)+\left(-125\right)+\left(-79\right)+258\)
\(=-227+258\)
\(=31\)
( - 23) + 37 + ( - 79) + ( - 125) +221
= [ ( -23) + ( -79) + ( -125) +221] + 37
= [ ( -227) +221 ] + 37
= ( -6) + 37
= 27
Mk nghĩ cái này nó ko khó, bn có thể tự làm đc mà!!! Câu nào khó ms hỏi nhé!!!
Sắp xếp theo thứ tự tăng dần :
a) \(9;58;743;68247;1258647.\)
b) \(34108;58610;60000;78645;84364.\)
c) \(1290;1902;2019;2910;9021;9201.\)
d) \(111;211;212;221;222;1112.\)
Đáp án:
a, 38+41+117+159+6238+41+117+159+62
=(38+62)+(41+159)+117=(38+62)+(41+159)+117
=100 +200 +117=100 +200 +117
=417=417
b, 73+86+968+914+303273+86+968+914+3032
=73+(86+914)+(968+3032)=73+(86+914)+(968+3032)
=73+1000 +4000=73+1000 +4000
=5073=5073
c, 341.67+341.16+659.83341.67+341.16+659.83
=341.(67+16)+659.83=341.(67+16)+659.83
=341.83+659.83=341.83+659.83
=83.(341+659)=83.(341+659)
=83.1000=83000=83.1000=83000
d, 42.53+47.156−47.11442.53+47.156-47.114
=42.53+47.(156−114)=42.53+47.(156-114)
=42.53 +47.42=42.53 +47.42
=42.(53+47)=42.100=42.(53+47)=42.100
=4200=4200
e, 563.23+23.26+23563.23+23.26+23
=23.(563+26+1)=23.(563+26+1)
=23.600=23.600
=13800=13800
f, 132+157+43+68132+157+43+68
=(132+68)+(157+43)=(132+68)+(157+43)
=200 +200=400=200 +200=400
g, 49.68+100.34+6849.68+100.34+68
=49.68+50.68+68=49.68+50.68+68
=68.(49+50+1)=68.(49+50+1)
=68.100=6800=68.100=6800
h, 491.(267+53)+491.(151+67)491.(267+53)+491.(151+67)
=491.(267+53+151+67)=491.(267+53+151+67)
=491.538=491.538
=264158=264158
Vote mk nha.
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, [(-23)+(-125)]+(37+221)+(-79)
=(-148)+258+(-79)
=110+(-79)=31
b, (-123)+34+(-65)+(-77)+125
=[(-123)+(-77)]+[(-65)+125]+34
=(-200)+60+34
=(-140)+34=106
có j sai mong bạn thông cảm
a, (-23)+37+(-79)+(-125)+221
=[-23+(-79)+(-125)]+(37+221)
=-227+258
=485
b, (-123)+34+(-65)+(-77)+125
=[-123+(-77)]+(-65+125)+34
=-200+60+34
=-140+34
=-106
c, (-48)+79+(-33)+(-76)+241
=[-48+(-33)+(-76)]+(79+241)
=-157+320
=163
a (221+23-58)-(58+221+23)
=221+23-58-58-221-23
=(221-221) + (23-23) +(-58-58)
=-116