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sa se calculeze ( -11 +23-8 ) + (- 15+45- 20) - (-43+57 )

Răspuns :

(-11+23-8)+(-15+45-20)-(-43+57)=
=(-19+23)+(-35+45)-14=
=4+10-14=
=14-14=
=0
:))
sciatem parantezele
-11+23-8-15+45-20+43+53
1)-11+23=12
2)12-8=4
3)4-15=-11
4)-11+45=34
5)34-20=14
6)14+43=57
7)57+53=110