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,
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