tính = cách hợp lí nhất

g: \(=-457+237+23-123=-220-100=-320\)

h: \(=\left(1-3\right)+\left(5-7\right)+...+\left(41-43\right)+\left(45-47\right)\)

\(=\left(-2\right)+\left(-2\right)+...+\left(-2\right)+\left(-2\right)\)

\(=-2\cdot12=-24\)

i: \(=173+27-46-54-19=200-100-19=100-19=81\)

k: \(=-52+82+49-15+13-36\)

\(=30+34-23\)

=30+11

=41

l: \(=\left(3-5\right)+\left(7-9\right)+\left(11-13\right)+\left(15-17\right)\)

\(=\left(-2\right)+\left(-2\right)+\left(-2\right)+\left(-2\right)\)

=-8

m: \(=\left(1-2\right)+\left(3-4\right)+...+\left(2001-2002\right)+2003\)

\(=2003-1-1-...-1\)

\(=2003-1001=1002\)

n:Số số hạng là:

\(\left[\left(-51\right)-\left(-99\right)\right]:1+1=49\left(số\right)\)

Tổng là \(\left(-51-99\right)\cdot\dfrac{49}{2}=-3675\)

o: \(=-62-38+1523-2523-92\)

\(=-100+1000-92=900-92=808\)

a)(-45).312-312-54.312

=312.[(-45)-1-54]

=312.(-100)

=-31200

b)217.(-46)-217.15-217.40+27

=217.[(-46)-15-40]+27

=217.(-101)+27

=217.[(-100)+(-1)]+27

=-21700+(-217)+27

=-21700+(-190)

=-21890

-43.15+43.48-48.43+48.15

=(-43.15+48.15)-(43.48-48.43)

=5.15-0=75

43.92 - 46.27 + 46.41

= 43.46.2 - 46.27 + 46.41

= 43.2.46 - 46.27 + 46.41

= 46.(43.2 - 27 + 41)

= 46.(86 - 27 + 41)

= 46.(59 + 41)

= 46.100

= 4600

   52 + 48 + 54 + 46 + 57 + 44 + 43

= ( 52 + 48) + ( 54 + 46) + ( 57 + 43) + 44

= 100 + 100 + 100 + 44

= 100 \(\times\) 1 + 100 \(\times\) 1 + 100 \(\times\) 1 + 44

= 100 \(\times\) ( 1 + 1 + 1) + 44

= 344

còn cách nữa

\(=27\left(43+93\cdot2\right)-43\cdot81\)

\(=27\cdot229-43\cdot81\)

=2700

= 1161+5022-3483

=2700

  -43 . 92 - 46 . 27 + 46 . 41 

= -3956 - 1242 + 1886

= -5198 + 1886

= -3312

137+(-46) +(-54)+(+27)+(-19)

=137-46-54+27-19

=45 

:))

137+(-46)+(-54)+(+27)+(-19)

=137-(46+54)+27-19

=164-19-100

=64-19

=45

137+(-46) +(-54)+(+27)+(-19)

= 137 + [(-46)+(-54)] +27-19

=137+100-19

=237-19

=218

Đây nhé bạn:))

218