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a) (5²-2⁵:2):3-1²⁰¹⁹ = b( 3²×2⁶-2⁵×6):12-2⁵=
c) (7⁴-7³):(7²-7)-2³×5=
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Răspuns :

a) (5²-2⁵:2):3-1²⁰¹⁹=

=(25-32:2):3-1=

=(25-16):3-1=

=9:3-1=

=3-1=2

b) (3²×2⁶-2⁵×6):12-2⁵=

=(9×64-32×6):12-32=

=(576-192):12-32=

=384:12-32=

=32-32=0

c) (7⁴-7³):(7²-7)-2³×5=

=7³(7-1):7(7-1)-8×5=

=7²-40=

=49-40=9

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