a: (-39)+67+(-19)+(-67)

=(-39-19)+(67-67)

=-58+0=-58

b: 246-(357-246)

=246-357+246

=492-357

=135

c: -111-(987-111)

=-111-987+111

=-987

d: (1234-4567)-(1234-67)

=1234-4567-1234+67

=-4567+67

=-4500

e: (134-388)-(12+134)

=134-388-12-134

=-388-12

=-400

bạn bt làm hả

ko

a, 988

b,333

c,1911

a) = ( 88 + 12 ) + 888 = 100 + 888 = 988

b) = ( 13 + 187 ) + 133 = 200 + 133 = 333

c) = 21 ( 61 + 30 ) = 21. 91 = 1911

     39.(-67)-110.61+(-39).43

= (-39).67-110.61+(-39).43

=-39.(67+43)-110.61

=39.110-110.61

=110.(39-61)

=110.(-22)

=-2420

\(39\cdot\left(-67\right)-110\cdot61+\left(-39\right)\cdot43=\left(-39\right)\cdot67+\left(-39\right)\cdot43-110\cdot61\)

\(=\left(-39\right)\left(67+43\right)-110\cdot61=\left(-39\right)\left(110\right)-110\cdot61=110\cdot\left[\left(-39\right)-61\right]\)

\(=110\cdot\left(-100\right)=-11000\)

Chúc bạn học tốt ^^!!!

đúng rồi bạn ơi

Ừ cảm ơn bạn

   95+67+5+33+82+39+18+61

=(95+5)+(67+33)+(82+18)+(39+61)

= 100    +100     +100      +100

=100x4

=400

chúc bn học giỏi nha

= 400 nka bn k mk nks 

17[21-(-111)]+17[29-121]=17.132+17.(-92)=17.[132+(-92)]=17.40=680

a) = 217. [(-39) + (-61)]
= 217 . -100
= -21700

= ( 60+40) +( 61-11 +50) + (51 + 70 -21) + ( 41 -31 +30 +10 +20)

=       100 +   100  +   100 + 70

= 370