\(\frac{36x22x51}{11x17x72}\)=\(\frac{2x3}{2}\)=3

giảm ước 36 và 72, 22 và 11, 51 và 17

36 x 12 + 36 x 45 + 36 x 33

= 36 x (12 + 45 + 33)

= 36 x 90

= 3240

b) 78 x 31 + 78 x 24 + 78 x 17 + 22 x 72

=78 x (31 + 24 + 17) + 22 x 72

= 78 x 72 + 22 x 72

= (78 + 22) x 72

= 100 x 72

= 7200

c) ( 34 - 17 )² - 2³ x 3²

\(=17^2-8.9\)

\(=289-72\)

\(=217\)

d)11²⁰ : 11¹⁹ + 3⁰ x 3²

\(=11^{20-19}+0\cdot9\)

\(=11+0\)

\(=11\)

`@` `\text {Ans}`

`\downarrow`

`2023 \times 14 + 2023 \times 83+97`

`= 2023 \times (14+83) + 97`

`= 2023 \times 97 + 97`

`= 196231 +97`

`= 196328`

`78 \times 31+78 \times 24+78 \times 17+78 \times 22 \times 72`

`= 78 \times (31+24+17+22 \times 72)`

`= 78 \times (31+24+17+1584)`

`= 78 \times 1656`

`= 129168`

`371 \times 69+371 \times 14+629 \times 83`

`= 371 \times (69+14) + 629 \times 83`

`= 371 \times 83 + 629 \times 83`

`= 83 \times (371+629)`

`= 83 \times 1000`

`= 83000`

`91 \times 51+49 \times 163-49 \times 72`

`= 91 \times 51 + 49 \times (163-72)`

`= 91 \times 51+49 \times 91`

`= 91 \times (51+49)`

`= 91 \times 100`

`= 9100`

`3 \times 12 \times 17 + 4 \times 9 \times 81 + 2 \times 6 \times 6`

`= 9 \times 4 \times 17 + 4 \times 9 \times 81 + 4 \times 9 \times 2`

`= 9 \times 4 \times (17+81+2)`

`= 36 \times 100` 

`= 3600`

`42 \times 17 + 58 \times 83 \times 42 \times 83 + 42 \times 83 + 17`

`= 17 \times (42+58) + 42 \times 83 \times (58 \times 83 +1)`

`= 17 \times 100 + 3486 \times 4815`

`= 1700 + 16785090`

`= 16786790`

36/11 x 22/17 x 51/72

= 36 x 22 x 51/11 x 17 x 72

= 36 x 2 x 11 x 17 x 3/11 x 17 x 36 x 2

= 3

22/16 x 64/55 x 27/13

= 22 x 64 x 27/16 x 55 x 13

=2 x 11 x 16 x 4 x 27/16 x 5 x 11 x 13

= 216/65

36 x 48/12 x 24 + 18 x 104/36 x 4

= 12 x 3 x 2 x 24/12 x 24 + 18 x 13 x 2 x 4/ 18 x 2 x 4

= 6 + 13

= 19

=

bn đó làm sai bài cuối cũng dc k à

117 x 36 + 117 x 72 - 17 x 72 - 17 x 36

= ( 117 - 17 ) x 36 - ( 117 - 17 ) x 72

= 100 x 36 - 100 x 72

= 100 x ( 36 - 72 )

= 100 x -36

 = -3600

____________________________________

408 x 53 - 5 x 204 - 204

= 408 x 53 - 5 x 204 - 204 x 1

= 408 x 53 - ( 5 - 1 ) x 204

= 408 x 53 - 4 x 204

= 21624 - 816

= 20808

Cảm ơn bạn Đinh Chí Công

a) (x-12)*17:11=51

             (x-12)=51:(17:11)

               x-12=33

                   x=33+12

                   x=45

b) 4*(36-4*x)=64

       (36-4*x)=64:4

       (36-4*x)=16

                 x=16:(36-4)

                 x=0.5

c) (x+5)*19:13=57

             (x+5)=57:(19:13)

               x+5=39

                   x=39-5

                   x=34

(x-12)*17:11=51

x=51*11:17+12=45 Vậy x=45

4*(36-4*x)=64

36-4*x=64:4=16

x= (36-16):4=5 Vậy x=5

(x+5)*19:13=57

x+5=57*13:19=39

x=39-5=34 Vậy x=34

k mik nha!

neu ta muon giai ta lay ;[ X - 12 ] = 51 : [ 17 : 11 ]  tiep den ta lay X - 12 = 33    X = 33 + 12 va X = 45   chuc ban hok tot !

a) 9/22 x 33/18 =3/4

b) 12/35 : 36/25 = 5/21

c) 19/17 : 76/51 =3/4

a) \(\frac{9}{22}\times\frac{33}{18}\)

\(=\frac{9}{22}\times\frac{11}{6}\)

\(=\frac{9\times11}{22\times6}=\frac{3}{4}\)

b) \(\frac{12}{35}:\frac{36}{25}=\frac{12}{35}\times\frac{25}{36}\)

                     \(=\frac{5}{21}\)

c) \(\frac{19}{17}:\frac{76}{51}=\frac{19}{17}\times\frac{51}{76}\)

                      \(=\frac{3}{4}\)

\(a,\frac{9}{22}x\frac{33}{18}\)

\(=\frac{3.3.11.3}{11.2.3.3.2}\)

\(=\frac{3}{2.2}\)

\(=\frac{3}{4}\)

\(b,\frac{12}{35}:\frac{36}{25}\)

\(=\frac{12}{35}.\frac{25}{36}\)

\(=\frac{12.25}{35.36}\)

\(=\frac{12.5.5}{5.7.12.3}\)

\(=\frac{5}{7.3}\)

\(=\frac{5}{21}\)

\(c,\frac{19}{17}:\frac{76}{51}\)

\(=\frac{19}{17}.\frac{51}{76}\)

\(=\frac{19.51}{17.76}\)

\(=\frac{19.17.3}{17.19.4}\)

\(=\frac{3}{4}\)