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Calculează:
a) 34 x 23 =
53 x 18 =
27 x 36 =
45 x 15 =
=
b) 408 x 25 =
314 x 19 =
276 x 34 =
157 x 38 =
c) 273 x 24 =
158 x 32 =
175 x 17 =
489 x 23 =​