=\(\frac{4}{23}\)- \(\frac{4}{23}\)+ ( \(\frac{5}{21}\)+ \(\frac{16}{21}\)) + 0,5

= 0 + 1 + 0,5

= 1 + 0,5 

= 1,5

Kết bạn với mình nhé

Cảm ơn bạn

a: \(17\cdot85+15\cdot17-120\)

\(=17\left(85+15\right)-120\)

=1700-120

=1580

b: \(2^3\cdot17-2^3\cdot14\)

\(=2^3\left(17-14\right)\)

\(=8\cdot3=24\)

c: \(20-\left\lbrack30-\frac{\left(5-1\right)^2}{2}\right\rbrack\)

\(=20-30+\frac{4^2}{2}\)

\(=-10+\frac{16}{2}=-10+8=-2\)

d: \(80-\left(4\cdot5^2-3\cdot2^2\right)\)

\(=80-\left(4\cdot25-3\cdot4\right)\)

=80-100+12

=92-100

=-8

e: \(27\cdot77+24\cdot27-27\)

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

\(=27\cdot100=2700\)

f: \(174:\left\lbrace2\cdot\left\lbrack36+\left(4^2-23\right)\right\rbrack\right\rbrace\)

\(=\frac{174}{2\cdot\left(36+16-23\right)}=\frac{87}{52-23}=\frac{87}{29}=3\)

ok ahahaha

a,4^2.120-4^2.(4.17)+4^2.34

=4^2.120-4^2.68+4^2.34

=4^2.(120-68+34)

=4^2.86

=16.86

=16.100-16.14

=1600-224

=1376

1,  17.( 85+15) -120 = 17. 100 -120 =1700 - 120 =1580

2, 

2³ . 17 - 2³ . 14

= 2³(17-14)

=2³. 3= 24

8: =>2x=210

hay x=105

6567578.X.6567578.Y:6098+6099+......+10000=200000000

(37-17).(-5)+23.(-13-17)

=[(37-17).(-5)]+23.[(-13)-17]

=[20.(-5)]+23.[(-13)+(-17)]

=(-100)+23.(-30)

=(-100)+[23.(-30)]

=(-100)+(-690)

=-790

Nếu đúng cho mình một tick nhé!