Question

Calculeaza si verifica rezultatul aplicand proba operatiei A= 1/8+5/4 B=-11/25-7/5 C 16/21-2/7

Answer 1

Răspuns:

Explicație pas cu pas:

A = 1/8 + 5/4 = 1/8 + 10/8 = 11/8

11/8 - 1/8 = 10/8 = 5/4 => proba

11/8 - 5/4 = 11/8 - 10/8 = 1/8 => proba

______________________

B = - 11/25 - 7/5 = - 11/25 - 35/25 = - 46/25

- 46/25 - ( - 11/25 ) = - 46/25 + 11/25 = - 35/25 = - 7/5 => proba

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C = 16/21 - 2/7 = 16/21 - 6/21 = 10/21

10/21 +  2/7  = 10/21 + 6/21 =16/21 => proba  

Answer 2

Raspuns:

Explicație pas cu pas:

A=1/8+5/4

A=1+10/8

A=11/8

PROBA:

11/8-5/4=1/8

(CORECT)

B=-11/25-7/5

B=-11+35/25

B=-46/25

PROBA:

-46/25+35/25=-11/25

(CORECT)

C=16/21-2/7

C=16-6/21

C=10/21

PROBA:

10/21+2/7=16/21

(CORECT)