((2 1/4)²-(1 1/2)²)×2 2/5+(4 3/5-2 7/10)³

Пошаговое объяснение:

1) (2 1/4)² = (9/4)² = 81/16 = 5 1/16

2) (1 1/2)² = (3/2)² = 9/4 =

2 1/4

3) 5 1/16 - 2 1/4 = 4 17/16 - 2 4/16 = 2 13/16

4) 2 13/16 * 2 2/5 = 45/16 * 12/5 = 9/4 * 3/1 = 27/4 = 6 3/4

5) (4 3/5 - 2 7/10)³ = (4 6/10 - 2 7/10)³ = (46/10 - 27/10)³ = (19/10)³ = 6859/1000 =

6 859/1000

5) 6 3/4 + 6 859/1000 =

6 750/1000 + 6 859/1000 = 12 1609/1000 = 13 609/1000 = 13,609