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Descoperă regula, apoi completea
a) 700, 710, 715, 725, 730,
b) 900, 890, 885, 875, 870,
c) 300, 302, 307, 309, 314,
d) 444, 455, 466,
e) 982, 883, 784,
f) 432, 533, 634,