49439808/11

\(=\dfrac{36\cdot22\cdot51}{11\cdot17\cdot72}=\dfrac{1}{2}\cdot3\cdot2=3\)

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

giảm ước 36 và 72, 22 và 11, 51 và 17

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) ( 36 x 28 + 36 x 45 ) : 73

= 36 x (28 + 45 ):73

=36 x 73 :73

= 36 x (73 : 73)

= 36 x 1

= 36

b) ( 98 x 17 - 26 x 17 ) : 72

= 17 x (98-17):72

= 17 x 72 :72

=17 x (72 :72)

= 17 x 1

= 17

a) ( 36 x 28 + 36 x 45 ) : 73 = 36 

b) ( 98 x 17 - 26 x 17 ) : 72 = 17 

\(\frac{22\cdot13\cdot17}{55\cdot26\cdot51}\)

\(=\frac{22\cdot13\cdot17}{55\cdot13\cdot2\cdot3\cdot17}\)

\(=\frac{11\cdot2}{55\cdot2\cdot3}\)

\(=\frac{11}{55\cdot3}=\frac{11}{165}\)

\(\frac{22.13.17}{55.26.51}\) = \(\frac{2.11.13.17}{11.5.13.2.17.3}\) = \(\frac{1}{15}\) 

. là dấu nhân nhé

3:

28/32=21/24

6/15=18/45

11/13=121/143

2:

7/2>4/79

27/9>2

51/17=3/1