Выполни вычисления по алгоритму. 70 · 4 = 7 дес. · 4 = 28 дес. = 280
450 : 9 = 45 дес. : 9 = 5 дес. = 50
60 · 8 =
дес. ·
=
дес. =
720 : 9 =
дес. :
=
дес. =
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