Tính:

\(2448:\left[119-\left(23-6\right)\right]\)

\(=2448:\left[119-17\right]\)

\(=2448:102\)

\(=24\)

___________________________

\(\left\{789+\left[324:\left(78-66\right)\right]\right\}+273\)

\(=\left\{789+\left[324:12\right]\right\}+273\)

\(=\left\{789+27\right\}+273\)

\(=816+273\)

\(=1089\)

Chúc bạn học tốt

\(4^3\times27-4^3\times23\)

\(=4^3\times\left(27-23\right)\)

\(=64\times4\)

\(=256\)

\(3^4\times71+3^4\times2^9\)

\(=3^4\times\left(71+2^9\right)\)

\(=81\times\left(71+512\right)\)

\(=81\times583\)

\(=47223\)

\(\left(3^3\times5^2-2^4-16\right)\times13\)

\(=\left(27\times25-16-16\right)\times13\)

\(=\left(675-16-16\right)\times13\)

\(=\left(659-16\right)\times13\)

\(=643\times13\)

\(=8359\)

\(35\times273+33\times35\)

\(=35\times\left(273+33\right)\)

\(=35\times306\)

\(=10710\)

\(2^3\times4^2+2^3\times84-40\)

\(=8\times16+8\times84-40\)

\(=8\times\left(16+84\right)-40\)

\(=8\times100-40\)

\(=800-40\)

\(=760\)

cảm ơn nhé!!

a) 19 + (x - 23) = 50

x - 23 = 50 - 19

x - 23 = 31

=> x  = 31 + 23

     x = 54

b) (273 - x) - 140 = 34

(273 - x) = 34 + 140

(273 - x) = 174

x = 273 - 174

x = 99

c) 56 - (x - 14) = 22

x - 14 = 56 - 22

x - 14 = 34

x = 34 + 14

x = 48

d) 172 - (137 - x) = 93

137 - x = 172 - 93

137 - x = 79

x = 137 - 79

x = 58

e) 13. (x - 14) = 91

x - 14 = 91 : 13

x - 14 = 7

x = 14 + 7

x = 21

g) (13 - x).17 = 51

13 - x = 51 : 17

13 - x = 3

x = 13 - 3

x = 10

chúc bn học giỏi ^^ !

ok mk nha!! ! 5654645645767676576558578779769675634636457567687689978978978978766876765657886567567

1.19+(x-23)=50

<=>x-23=50-19

<=>x-23=31

<=>x=31+23

<=.x=54

vậy x=54

2.(273-x)-140=34

<=>273-x=34+140

<=>273-x=174

<=>x=273-174

<=>x=99(thoả mãn)

vậy x=99

a. 21873

b. 12831

c. 213785

d. 169500

a) $951.23=21873$

b) $47.273=12831$

c) $845.253=213785$

d) $1356.125=169500$

A)2853

B)12831

C)213785

D)169500

86x273-273x85+273

=273.(86-85+1)

=273.2

=546

bạn có cách trình bày nào khác ko 

mk làm tính nhiều các ý

số cần tìm là

86 x 273 - 273 x 85 +273 =546

đáp số;546

Tính :

a) | 273 | + | -127 |

= 273 + 127

= 400

b) | -193 | - | -93 |

= 193 - 93

= 100

c) | -16 | . | 5 |

= 16 . 5

= 80

d) | -3542 | : | 23 |

= 3542 : 23

= 154

Chúc bạn học tốt!

a) |273| + |-127| = 273 + 127 = 400

b) |-193| - |-93| = 193 - 93 = 100

c) |-16| . |5| = 16 . 5 = 80

d) |-3542| : |23| = 3542 : 23 = 154

mik giải bài 2 thôi nhá

a)273+2011+127+589=(273+127)+(2011+589)=400x2600=1040000

b)23x73+23x27-1500=23x(73+27)-1500=23x100-1500=2300-1500=800

c)101x62=(100+1)x62=100x62+62=6200+62=6262

d)279+68=(300-21)+(100-32)=300-21+100-32=(300+100)-(21+32)=400-53=347

e)\(\frac{23.35+45.23+23.19+23}{23}=\frac{23\left(35+45+19+1\right)}{23}=35+45+19+1=100\)

a: =1/8-1/8+2/5=2/5

b: =(-1/15-14/15)+(23/27+31/27)=2-1=1

c: \(=\dfrac{3}{7}\left(\dfrac{22}{21}+\dfrac{5}{21}+\dfrac{15}{21}\right)=\dfrac{3}{7}\cdot2=\dfrac{6}{7}\)

d: \(=\dfrac{-8}{9}\cdot\dfrac{3}{2}+\dfrac{1}{9}\cdot\dfrac{-3}{2}=-\dfrac{3}{2}\)

VD và BT là ý j vậy

e ns rõ đề tý để chj còn làm