Verified answer

Пошаговое объяснение:

4/9 * 2/7 * 1 3/4 = 4/9 * 2/7 * 7/4 = 4/9 * 1/1 * 1/2 = 4/18 = 2/9

2 4/9 * 6/11 - 25/27 = 22/9 * 6/11 - 25/27 = 2/3 * 2/1 - 25/27 = 4/3 - 25/27 = 36/27 - 25/27 = 11/27

(1 3/4)² = (7/4)² = 7²/4² = 49/16 = 3 1/16

4 4/9 * 5/8 + 5/8 * 3 5/9 = 5/8 * (4 4/9 + 3 5/9) =

5/8 * 7 9/9 = 5/8 * 8 = 40/8 = 5

6 3/4х * 1 11/45у = (6 3/4 * 1 11/45) * (х * у) =

(27/4 * 56/45) * ху = (3/1 * 14/5) * ху = 42/5 * ху =

8 2/5ху

Ответ:

Пошаговое объяснение:

1)

4/9 * 2/7 * 1 3/4 = 4/9 * 2/7 * 7/4 = 4/9 *  2/4 =  2/9

2)

2 4/9 * 6/11 - 25/27 = 22/9 * 6/11 - 25/27 = 2/3 * 2 - 25/27 = 4/3 - 25/27 =    =36/27 - 25/27 = 11/27

3)

(1 3/4)² = (7/4)² = 49/16 = 3 1/16

4)

4 4/9 * 5/8 + 5/8 * 3 5/9 = 40/9 * 5/8 + 5/8 * 32/9 = 5/8 * (40/9 + 32/9) =

5/8 * 72/9 = 5/8 * 8 = 40/8 = 5

5)

6 3/4х * 1 11/45у = 27/4х * 56/45 у = 3х * 14/5у  = 42/5 ху = 8 2/5ху = 8,4ху