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(2,5-0,25-2)•10+1supra2=

Răspuns :

(2,5-0,25-2)•10+1supra2=
(2,25-2)•10+ 0,5=
0,25•10+0,5=
2,5+0,5= 3

(2,5-0,25-2)•10+1/2= (2,25-2)•10+1/2= 0,25•10+1/2= 2,5+1//2= 2,5+0,5= 3