234-117+ (-100)+(-234)

= (234-234)+ (-117-100)

= 0+ (-217)

= -217

(-234)-117+(-100)-(-234)

= -217

Chúc bn học tốt!

(-234)-117+(-100)-(-234)

=(-100)+(-234)+117+(-234)

=(-334)+(-117)

=-451

(-234)-117+(-100)-(-234)

= -217

Đáp số:-217

Chúc bạn học tốt

\(234+\left(-117\right)+\left(-100\right)+\left(-234\right)\)

\(=117+\left(-100\right)+\left(-234\right)\)

\(=17+\left(-234\right)\)

\(=-217\)

ko bt vì tui học lơp 5

234-117+(-100)+(-234)

=234+(-117)+(-100)+(-234)

=[234+(-234]+(-100)+(-117)

=0+(-100)+(-117)

=-217

(-927)+1421+930+(-1421)

=[(-1421)+1421]+[(-927)+930]

=0+3

=3

a) 234-117+(-100)+(-234)

=234+(-234)-117+(-100)

=0-117-100

=(-117)-100

=-217

b) -927+1421+930+(-1421)

=[-927+930]+[1421-1421)]

=3+0

=3

Câu 2: a) 234-117+(-100)+(-234)=[234+(-234)]-117-100=0-117-100=-217

b) -927+1421+930+(-1421)=-927+930+[1421+(-1421)]=-927+930+0=3

Bài 1:

s1=1+(-3)+5+(-7)+............+17

s2=-2+4+(-6)+8+...........+(-18)
\(\Rightarrow\) s1 + s2 = (1-2-3+4)+(5-6-7+8)+...+(13-14-15+16)+17-18

= 0 + 0 + ...+ 0 + (-1)

= -1

Bài 2.

a) 234-117+(-100)+(-234)

= (-234 + 234 ) + [- 117 + (-100)]

= 0 + (-217)

= -217

b) -927+1421+930+(-1421)

= ( -1421 + 1421 ) + ( -927 + 930 )

= 0 + 3

= 3

a: \(\left(24-234\right)+\left(234-24-77\right)\)

\(=24-234+234-24-77\)

\(=\left(24-24\right)+\left(234-234\right)-77\)

=0+0-77

=-77

b: \(\left(13-135+49\right)-\left(13+49\right)\)

\(=13-135+49-13-49\)

\(=\left(13-13\right)+\left(49-49\right)-135\)

=0+0-135

=-135

c: \(159-524-\left(59-424\right)\)

\(=159-524-59+424\)

\(=\left(159-59\right)-\left(524-424\right)\)

=100-100

=0

d: \(\left(36+79\right)+\left(145-79-36\right)\)

\(=36+79+145-79-36\)

\(=\left(36-36\right)+\left(79-79\right)+145\)

=0+0+145

=145

e: \(334-\left(117+234\right)+\left(42+117\right)\)

\(=334-117-234+42+117\)

\(=\left(334-234\right)+\left(117-117\right)+42\)

=100+0+42

=142

f: \(271-\left[\left(-43\right)+271-\left(-17\right)\right]\)

\(=271+43-271+\left(-17\right)\)

\(=\left(271-271\right)+\left(43-17\right)\)

=0+26

=26