\(\left[27\cdot\left(-67\right)+33\cdot\left(-27\right)\right]:\left(-30\right)\)
⇔\(\left[27\cdot\left(-67\right)+\left(-33\right)\cdot27\right]:\left(-30\right)\)
⇔\(\left\{27\left[\left(-67\right)+\left(-33\right)\right]\right\}:\left(-30\right)\)
\(=\left\{27\cdot\left(-100\right)\right\}:\left(-30\right)\)
\(=\left(-2700\right):\left(-30\right)\)
\(=900\)

\(PeaGea\)

37*25+37*27-27*37+27*25

37*25+0+27*25

25*50

=cocainit

37.(25 + 27) - 27.(37 + 25)

= 37.25 + 37.27 - 27.37 - 27.25

= (37.25 - 27.25) + (37. 27 - 27.37)

= 25.(37-27) + 0

= 25.10

= 250 

341 x 16 + 341 x 67 + 659 x 83

= 341 x ( 16 + 67 ) + 659 x 83

= 341 x 83 + 659 x 83

= ( 341 + 659 ) x 83

= 1000 x 83

= 83000

27 x 72 + 27 x 27 +27

= 27x 72 + 27x 27 + 27 x 1

= 27 x ( 72 + 27 + 1 )

= 27 x 100

= 2700

hok tốt

BÀi 1:

a: (-243+345)-(257+(-55)-129)

=-243+345-257+55+129

=(-243-257)+(345+55)+129

=-500+400+129

=-100+129

=29

b: \(\left(-2\right)^3-45:\left(-3\right)^2-\left(-2019\right)^0\cdot\left(-1\right)^{2019}\)

\(=-8-\frac{45}{9}-1\cdot\left(-1\right)\)

=-8-5+1

=-13+1

=-12

c: \(\left\lbrack27\cdot\left(-67\right)+33\cdot\left(-27\right)\right\rbrack:\left(-30\right)\)

\(=\frac{-27\left(67+33\right)}{-30}\)

\(=\frac{9}{10}\cdot100=90\)

d: \(\left(1^2+2^2+\cdots+100^2\right)\left(3^4-9^2\right)\)

\(=\left(1^2+2^2+\cdots+100^2\right)\left(81-81\right)\)

=0

e: \(53\cdot47+53^2-2021^0\)

\(=53\left(53+47\right)-1\)

=5300-1

=5299

i: 38+(-21)+(-58)+(-6)

=(38-58)+(-21-6)

=-20-27

=-47

h: (2020+27)-[2020+(-73)]-129

=2020+27-2020+73-129

=100-129

=-29

Sai de roi.

27x32+27x67+27

 Bạn có thể đánh sai đề bài nên mk sửa lại một chút.

   27 x 32 + 27 x 67 + 27 

= 27 x 32 + 27 x 67 + 27 x 1

= 27 x ( 32 + 67 + 1 )

= 27 x 100 

= 2700.

25x-26x-27x=46-41+30

-28x=35

x=35:-28

x=-5/4=-1,25

\(\left(\frac{1}{3}+\frac{12}{67}+\frac{13}{41}\right)-\left(\frac{7.9}{67}-\frac{27}{41}\right)\)

\(\left(\frac{1}{3}+\frac{12}{67}+\frac{13}{41}\right)-\left(\frac{63}{67}-\frac{27}{41}\right)\)

\(=\frac{6836}{8241}-\frac{774}{2747}\)

\(=\frac{4514}{8241}\)

bằng \(\frac{4514}{8241}\)

tk nha , thanks nhìu

a)\(29.\left(-13\right)-27.\left(-29\right)-14.\left(-29\right)\)

\(=13\left(-29\right)-27.\left(-29\right)-14.\left(-29\right)\)

\(=-29.\left(13-27-14\right)\)

\(=\left(-28\right).\left(-29\right)\)

\(=812\)