a: -127+208-73+92

\(=\left(-127-73\right)+\left(208+92\right)\)

\(=300-200=100\)

b: \(-46+391+246-691\)

\(=\left(-46+246\right)+\left(391-691\right)\)

\(=200-300=-100\)

c: \(-472+\left(235-28\right)-\left(35-350\right)\)

\(=-472+235-28-35+350\)

\(=\left(-472-28\right)+350+\left(235-35\right)\)

\(=-500+350+200=50\)

a) -127+208-73+92

b) 

c) 

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

  -43 . 92 - 46 . 27 + 46 . 41 

= -3956 - 1242 + 1886

= -5198 + 1886

= -3312

kết quả bằng -232

 Đáp án là -232

-2456 - (357 - 2456) + 125

= (-2456) + (-357) + 2456 + 125 

= [(-2456) + 2456] + [(-357) + 125]

= 0 + (-232)

= -232

B. 46 NST đơn

a) 38 . (72 + 48) . 62 . (74 + 46)

=38 . 120 . 62  . 120

= 120 . (62 + 38)

= 120 . 100

= 12 000

b) 92 . (278 - 68) : (70 . 92)

=92 . 210 : 70 . 92

= \(\frac{92.210}{70.92}\)

=\(\frac{210}{70}\)= 3

kích mình nhé

a) 92 + 74 + 26 = 92 + (74 + 26)

= 92 + 100 = 192

b) 12 + 14 + 16 + 18 = (12 + 18) + (14 + 16)

= 30 + 30 = 60

c) 592 + 99 + 208 = (592 + 208) + 99

= 800 + 99 = 899

d) 60 + 187 + 40 + 13 = (60 + 40) + (187 + 13)

= 100 + 200 = 300

39 + 92 = 131

28 + 46 = 74

39+92=131
28+46=74

29+92=131

28+46=74