Question

Va rog,punctele 5,6,7,8 !

Answer 1

5

(-2/3)(6/5) + 1/2(-4/3) -(-2)3/10

= - 4/5 - 2/3 + 3/5

= - 1/5 - 2/3

= (- 3 - 10)/15

= - 13/5

6

(1/2 - 1/3)(1/2 + 1/3)(- 1) =

= (1/4 - 1/9)(- 1)

= (9 - 4)/36 (- 1)

= 5/36 (- 1)

= - 5/36

7

(- 4)(- 3/8)(- 3/8 - 3/8×5/3 ) =

= (3/5)(- 3/8 - 5/8)

= (3/5)(-8/8)

= - 3/5

8

0,8(0,75 - 1/4)(- 2) =

= 8/10(3/4 - 1/4)(- 2)

= 4/5×2/4×(- 2)

= - 4/5