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Efectueaza scaderile repetate
a)4-2-2. b)21-7-7-7
12-3-3-3-3. 14-7-7
24-6-6-6-6. 36-9-9-9-9
20-5-5-5-5. 40-8-8-8-8-8


Răspuns :

toate rezultatele sunt 0
a)4-2-2=0
b)21-7-7-7=0
c)12-3-3-3-3=0
d)14-7-7=0
e)
24-6-6-6-6=0
f)
36-9-9-9-9=0
g)
20-5-5-5-5=0
h)
40-8-8-8-8-8=0