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4)a)|7-5|+19+|21-29|-8
b)-|-13-2|+|2-7|+|-10
c)||9-11|-|-1+16||+||-13||
d)(-17+5)+|2-14|+|-34|-34


Răspuns :

a) 2+18=20

b)15-5-13=-3

c)1-15-13=-14-13=1

d)-22-12=34