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2×500-[80+(247×4-801÷9)-300=

Răspuns :

=1000-[80+(988-89)-300]
=1000-[(80+899)-300]
=1000-(979-300)
=1000-679
=321
2×500-[80+(247×4-801:9)-300=
2×500-[80+(988-89)-300=
2×500-(80+899)-300=
2×500-979-300=
1000-679=
321
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