Question

Efectuati calculul

VA ROG AJUTATI—MA!!​

Answer 1

Răspuns:

-5ab

Explicație pas cu pas:

0, ( 5 ) = 5 / 9

1, ( 6 ) = 1  6 / 9 = ( 1 x 9 + 6 ) / 9 = ( 9 + 6 ) / 9 = 15 / 9 = 5 / 3

5 / 9a x 0,3b + 0,5a x 5 / 3b - 2,3 x 3ab + 0,9ab =

= 5 / 9a x 3 / 10b + 5 / 10a x 5 / 3b - 6,9ab + 0,9 ab

= 1 / 3a x 1 / 2b + 5 / 6ab - 6,9ab + 0,9ab

= 1 / 6ab + 5 / 6 ab - 6,9ab + 0,9ab

= 6 / 6ab - 69 / 10ab + 9 / 10ab

= ab - 69 / 10ab + 9 / 10ab

= ab / 1 - 69 / 10ab + 9 / 10ab

= 10ab / 10 - 69 / 10ab + 9 / 10ab

= ( 10ab - 69ab + 9ab ) / 10

= ( -59ab + 9ab ) / 10

= -50ab / 10

= -5ab