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8000-80:(20:2x4:8x6:3)=(12:3:2x8:4)x2x999=

Răspuns :

 8000-80:(10x4:8x6:3) = (4:2x8:4)x2x999=
8000-80:( 40:8x6:3) = (2x8:4) x2x999=
8000-80:(5x6:3)= (16:4) x2x999=
8000-80:( 30:3) =4x2x999=
8000-80:10= 8x999=
8000-8=7992
7992=7992

Este foarte corect, daca nu intelegi , intreaba pe cienva . Asa se face ! Coroana te rog?
8000-80:(10x4:8x6:3)=(4:2x8:4)x2x999=
8000-80:(40:8x6:3)=(2x8:4)x2x999
8000-80:(5x6:3)=(2x8:4)x2x999
8000-80:(30:3)=(16:4)x2x999
8000-80:10=4x2x999
8000-8=8x999
7992=7992    Adevarat