a ) 42.13 + 22.15 - 42.3 - 22.5

= 42 . 13 - 42.3 + ( 22.15 - 22. 5 )

= 42 . ( 13 - 3 ) + 22. ( 15 - 5 )

= 42. 10 + 22 . 10

= 10. ( 42 + 22 )

= 10 . 64

= 6400

b ) 24 . 42 - 35. 24 - 24.7

= 24. ( 42 - 35 - 7 )

= 24 . 0

= 0 

\(a,42.13+22.15-42.3-22.5\)

\(=42.13-42.3+22.15-22.5\)

\(=42.\left(13-3\right)+22.\left(15-5\right)\)

\(=42.10+22.10\)

\(=10.\left(22.42\right)\)

\(=10.64=640\)

\(b,24.42-35.24-24.7\)

\(=24.\left(42-35-7\right)\)

\(=24.0=0\)

a) 25.76+24.35 + \(5^3.2^3\)=x

25.76+24.35+ 125. 8=x

1900+ 840+1000=x

2740+840+1000=x

3580+1000=x

4580=x. Vậy x= 4580

b) 4x-166=\(3^3:3^2\)

4x-166=3

4x= 166+3

4x= 169

x= 169: 4

x= 42,25

c) x-4.\(5^2+3^2:2^4\)= 0

x- 4.25+ 9: 16=0

x- 100+0,5625=0

x - 100,5625=0

x=0+100,5625

x= 100,5625

d) 4x - 158 = \(2^3.3^2\)-50

4x-158= 8.9-50

4x-158= 72-50

4x-158= 22

4x= 158+22

4x=180

x= 180:4

x= 45

xin hãy giúp mik đi mà

a. 57720 : (6531 - 5976) x 23

= 57720 : 555 x 23

= 104 x 23

= 2392

a. 57720 : (6531 - 5976) x 23

    57720 : 555 x 23

    104 x 23

     2392

b. 3878 x 154 - 879 x 154 + 154

    597212 - 879 x 154 + 154

    596333 x 154 + 154

    91835282 + 154

    91835436

Lời giải:
$(-364)-x=-364-(-154)=-364+154=-(364-154)=-210$

Đáp án cần chọn là: A