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7:(5/2-2/5) +11/30:1 intreg 2/3+(-1) la 2005​

Răspuns :

7:(5/2-2/5)+11/30:1 intreg 2/3+(-1) la2005=

7:21/10+11/30:5/3-1=

7×10/21+11/30×3/5-1=

10/3+11/50-1=

(500+33)/150-1=

533/150-1=

(533-150)/150=

383/150=

2,55