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Dauuuu coroanaaaa promitttttt
Doar exercitiile:12,13
Plsssssss vaa rooggg saaa lee facetii corecteeee
Promit dauu coroanaaaa


Dauuuu Coroanaaaa PromittttttDoar Exercitiile1213Plsssssss Vaa Rooggg Saaa Lee Facetii CorecteeeePromit Dauu Coroanaaaa class=

Răspuns :

12)
a)
{[(45×5+175)×2-300]×15-75×4}×4-6795=
={[(225+175)×2-300]×5-300}×4-6795=
=[(400×2-300)×5-300]×4-6795=
=[(800-300)×5-300]×4-6795=
=(500×5-300)×4-6795=
=(2500-300)×4-6795=
=2200×4-6795=
=8800-6795=
=2005

b)
5×{25×8-[221-(56×4-213)×11]×2}+597=
=5×{200-[221-(224-213)×11]×2}+597=
=5×[200-(221-11×11)×2]+597=
=5×[200-(221-121)×2]+597=
=5×(200-100×2)+597=
=5×(200-200)+597=
=5×0+597=
=0+597=
=597

13)
a)
{[(51×17+51×83)×10+49×1000]×3-200000}×10=
={[(867+51×83)×10+49×1000]×3-200000}×10=
={[(867+4233)×10+49000]×3-200000}×10=
=[(5100×10+49000)×3-200000]×10=
=[(51000+49000)×3-200000]×10=
=(100000×3-200000)×10=
=(300000-200000)×10=
=100000×10=
=1000000

b)
{[(38×37+38×63)×10+62×1000]×5-300000}×10=
={[(1406+2394)×10+62000]×5-300000}×10=
=[(3800×10+62000)×5-300000]×10=
=[(38000+62000)×5-300000]×10=
=(100000×5-300000)×10=
=(500000-300000)×10=
=200000×10=
=2000000