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Transforma exercitiile date in exercitii fara paranteze,apoi rezolva:

Exercitiile:(28+21+14):7 ;(72-32-16):8 ;(27+45+9):9 ;(54-18-12):6


Răspuns :

(28+21+14):7=28/7+21/7+14/7=4+3+2=9
(72-32-16):8=72/8-32/8-16/8=9-4-2=3
(27+45+9):9=27/9+45/9+9/9=3+5+1=9
(54-18-12):6=54/6-18/6-12/6=9-3-2=4