ГДЗ по математике 5 класс Алышева Тысяча Задание 490

\[\boxed{\mathbf{490.}}\]

\[1)\ 260\ :2 = 130\]

\[264\ :2 = 132\]

\[2)\ 420\ :2 = 210\]

\[210 \cdot 2 = 420\]

\[428\ :2 = 214\]

\[214 \cdot 2 = 428\]

\[360\ :3 = 120\]

\[120 \cdot 3 = 360\]

\[369\ :3 = 123\]

\[123 \cdot 3 = 369\]

\[840\ :2 = 420\]

\[420 \cdot 2 = 840\]

\[846\ :2 = 423\]

\[423 \cdot 2 = 846\]

\[690\ :3 = 230\]

\[230 \cdot 3 = 690\]

\[609\ :3 = 203\]

\[203 \cdot 3 = 609\]