a)27*77+24*27-27=27*(77+24-1)=27*100=2700

b)(-12)+(-9)+121+|-20|=-21+121+20=100+20=120

c)2⁵*101-2⁵*101⁰=2⁵*101-2⁵*1=2⁵*(101-1)=32*100=3200

2700

120

3200

27. 77 + 24 . 27 - 27

= 27 . (77 + 24 - 1)

= 77 . 100

= 7700

Chúc bạn học tốt!

=2700

  mk nha

\(-27.77-54.11-27\\ =27.\left(-77\right)-27.22-27.1\\ =27.\left(-77-22-1\right)\\ =27.\left(-100\right)\\ =-2700\)

Cảm ơn nhiều ạ! 

\(27.77+24.27-27\)

\(=27.\left(77+24-1\right)\)

\(=27.100\)

\(=2700\)

\(174\div\left\{2\left[36+\left(4^2-23\right)\right]\right\}\)

\(=174\div\left\{2\left[36+\left(16-23\right)\right]\right\}\)

\(=174\div\left\{2\left[36+\left(-7\right)\right]\right\}\)

\(=174\div\left\{2.29\right\}\)

\(=174\div58\)

\(=3\)

\(3^2.4-\left[30-\left(5-2\right)^2\right]\)

\(=9.4-\left[30-3^2\right]\)

\(=36-\left[30-9\right]\)

\(=36-21\)

\(=15\)

1)69.24+69.120+144.31

= 69. (24+120) + 144.31

= 144.69 + 144.31

= 144. (69+31)

= 144.100

=14 400

2)95.103-95.2-95

= 95. (103-2-1)

= 95.100

= 9 500

4)47.62+31.106

= 47. 62+ (31.2). 53

= 47.62 + 62. 53

= 62. (47+53)

= 62.100

= 6 200

5) 54.12+27.77-27

= 27. (2.12) + 27.77 - 27.1

= 27. 24 + 27.77 - 27.1

= 27. (24+77-1)

= 27. 100

= 2 700

6) 49+215+51+83+85

= (49+51) + (215+85)+ 83

= 100 +300 + 83

= 483

27 x 129 - 29 x 27 + 100 x 73

= 27 x ( 129 - 29 ) + 100 x 73

=27 x 100 + 100 x 73

=100 x (27 + 73 )

= 100 x 100

= 10000

k mình nha

I love you

\(27.\left(129-29\right)+100.73\)

\(27.100+100.73\)

\(100.\left(27+73\right)\)

\(100.100=10.000\)

tích ak 

a: =17x100-120=1700-120=1580

a) \(17\cdot85+15\cdot17-120\)
\(=17\cdot\left(85+15\right)-120\)
\(=17\cdot100-120\)
\(=1700-120\)
\(=1580\)
b) \(27\cdot77+24\cdot27-27\)
\(=27\cdot\left(77+24-1\right)\)
\(=27\cdot100\)
\(=2700\)

54 x 77 + 27 x 46

= ( 54 : 2) x 77 + 27 x 46

=     27     x  77 + 27 x 46

=       27 x ( 77 + 46 )

=       27 x      123

=     3321

54 x 77 + 27 x 46

= ( 54 : 2 ) x ( 77 x 2 ) + 27 x  46

= 27 x 154 + 27 x 46

= 27 x ( 154 + 46 )

= 27 x 200

= 5400

\(\frac{6^8.16^5}{2^{27}.27^3}\)

\(=\frac{\left(2.3\right)^8.\left(2^4\right)^5}{2^{27}.\left(3^3\right)^3}\)

\(=\frac{2^8.3^8.2^{20}}{2^{27}.3^9}\)

\(=\frac{2^{28}.3^8}{2^{27}.3^9}\)

\(=\frac{2}{3}\)

Ta có: \(\frac{6^8.16^5}{2^{27}.27^3}\)

=\(\frac{\left(2.3\right)^8.\left(2^4\right)^5}{2^{27}.\left(3^3\right)^3}\)

=\(\frac{2^8.3^8.2^{20}}{2^{27}.3^9}\)

=\(\frac{2^{27}.2.3^8}{2^{27}.3^8.3}\)

=\(\frac{2}{3}\)

Hok tốt