SOS help mấy ní ơi $---(-17)+11+(-13)+15+(-17)$,A. . mh nanh,$a)~(2354-45)-2354$ $b)~(-2009)-(234-2009)$,$c)~(16+23)+(153-16-23)$ $d)~(134-167+45)-(134+45)$,$e)~-3752-(29-3632)-51$ $f)~321+\{-15+[30+(-321)]\}$,$g)~4524-(864-999)-(36+3999)$ $h)~1000-(137+572)+(263-291)$,$i)~(1267-196)-(267+304)$ $k)~(3965-2378)-(437-1378)-528$,$1)~(2002-79+15)-(-79+15)$ $m)~-329-(15-101)-(25-440)$,$n)~(1456+23)-1456$ $o)~(-1999)-(-234-1999)$,$p)~(116+124)-(215-116-124)$ $q)~(435-167-89)-(435-89)$,Bài 5. Thu gon các tổng sau:

Question

SOS  help mấy ní ơi $---(-17)+11+(-13)+15+(-17)$,A. .  mh  nanh,$a)~(2354-45)-2354$ $b)~(-2009)-(234-2009)$,$c)~(16+23)+(153-16-23)$ $d)~(134-167+45)-(134+45)$,$e)~-3752-(29-3632)-51$ $f)~321+\{-15+[30+(-321)]\}$,$g)~4524-(864-999)-(36+3999)$ $h)~1000-(137+572)+(263-291)$,$i)~(1267-196)-(267+304)$ $k)~(3965-2378)-(437-1378)-528$,$1)~(2002-79+15)-(-79+15)$ $m)~-329-(15-101)-(25-440)$,$n)~(1456+23)-1456$ $o)~(-1999)-(-234-1999)$,$p)~(116+124)-(215-116-124)$ $q)~(435-167-89)-(435-89)$,Bài 5. Thu gon các tổng sau:

Accepted Answer

a) $(2354-45)-2354$
   Ta có: $(2354-45)-2354 = 2309 - 2354 = -45$

b) $(-2009)-(234-2009)$
   Ta có: $(-2009)-(234-2009) = -2009 - 234 + 2009 = -234$

c) $(16+23)+(153-16-23)$
   Ta có: $(16+23)+(153-16-23) = 39 + (153 - 39) = 39 + 114 = 153$

d) $(134-167+45)-(134+45)$
   Ta có: $(134-167+45)-(134+45) = (-33 + 45) - (134 + 45) = 12 - 179 = -167$

e) $-3752-(29-3632)-51$
   Ta có: $-3752-(29-3632)-51 = -3752 - (-3603) - 51 = -3752 + 3603 - 51 = -200$

f) $321+\{-15+[30+(-321)]\}$
   Ta có: $321+\{-15+[30+(-321)]\} = 321 + (-15 + [30 - 321]) = 321 + (-15 + [-291]) = 321 + (-306) = 15$

g) $4524-(864-999)-(36+3999)$
   Ta có: $4524-(864-999)-(36+3999) = 4524 - (-135) - 4035 = 4524 + 135 - 4035 = 624$

h) $1000-(137+572)+(263-291)$
   Ta có: $1000-(137+572)+(263-291) = 1000 - 709 + (-28) = 291 - 28 = 263$

i) $(1267-196)-(267+304)$
   Ta có: $(1267-196)-(267+304) = 1071 - 571 = 500$

k) $(3965-2378)-(437-1378)-528$
   Ta có: $(3965-2378)-(437-1378)-528 = 1587 - (-941) - 528 = 1587 + 941 - 528 = 2000$

l) $(2002-79+15)-(-79+15)$
   Ta có: $(2002-79+15)-(-79+15) = 1938 - (-64) = 1938 + 64 = 2002$

m) $-329-(15-101)-(25-440)$
   Ta có: $-329-(15-101)-(25-440) = -329 - (-86) - (-415) = -329 + 86 + 415 = 172$

n) $(1456+23)-1456$
   Ta có: $(1456+23)-1456 = 1479 - 1456 = 23$

o) $(-1999)-(-234-1999)$
   Ta có: $(-1999)-(-234-1999) = -1999 - (-2233) = -1999 + 2233 = 234$

p) $(116+124)-(215-116-124)$
   Ta có: $(116+124)-(215-116-124) = 240 - (215 - 240) = 240 - (-25) = 240 + 25 = 265$

q) $(435-167-89)-(435-89)$
   Ta có: $(435-167-89)-(435-89) = (268 - 89) - (435 - 89) = 179 - 346 = -167$

Đáp số: 
a) $-45$
b) $-234$
c) $153$
d) $-167$
e) $-200$
f) $15$
g) $624$
h) $263$
i) $500$
k) $2000$
l) $2002$
m) $172$
n) $23$
o) $234$
p) $265$
q) $-167$