\[\boxed{\mathbf{4.}}\]
\[1)\ (28 \cdot 5)\ :7 = (28\ :7) \cdot 5 =\]
\[= 4 \cdot 5 = 20\]
\[2)\ (19 \cdot 30)\ :6 = (30\ :6) \cdot 19 =\]
\[= 5 \cdot 19 = 95\]
\[\mathbf{14.5.\ Деление\ многозначных\ чисел}\]
\[\boxed{\mathbf{1.}}\]
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\[\boxed{\mathbf{2.}}\]
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