Решебник по математике 4 класс Кремнева рабочая тетрадь Часть 1, 2 Часть 1 | Страница 25

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\[2000\ :40 = 50 + 70 = 120 \cdot 5 =\]

\[= 600 - 480 = 120\]

\[72\ 900 - 900 = 72\ 000\ :800 =\]

\[= 90 \cdot 30 = 2700 - 2000 = 700\]

\[56\ 000\ :700 = 80 + 120 =\]

\[= 300 \cdot 60 = 12\ 000\ :4000 = 3\]

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\[75 = 15 \cdot 5\]

\[75 = 50 + 25\]

\[75 = 60 + 15\]

\[75 = 90 - 15\]

\[75 = 80 - 5\]

\[75 = 150\ :2\]

\[320 = 80 \cdot 4\]

\[320 = 300 + 20\]

\[320 = 220 + 100\]

\[320 = 350 - 30\]

\[320 = 400 - 80\]

\[320 = 640\ :2\]

\[90 = 30 \cdot 3\]

\[90 = 45 + 45\]

\[90 = 80 + 10\]

\[90 = 95 - 5\]

\[90 = 100 - 10\]

\[90 = 180\ :2\]