Решебник по математике 7 класс Алышева рабочая тетрадь | Страница 47

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\[32\ 980 - 20 = 32\ 960\]

\[32\ 980 + 20 = 33\ 000\]

\[32\ 980 \cdot 20 = 659\ 600\]

\[32\ 980\ :20 = 1\ 649\]

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\[1)\ 1\ 253 \cdot 20 = 25\ 060\]

\[1\ 353 \cdot 30 = 40\ 590\]

\[1\ 453 \cdot 40 = 58\ 120\]

\[1\ 553 \cdot 50 = 77\ 650\]

\[1\ 653 \cdot 60 = 99\ 180\]

\[1\ 753 \cdot 70 = 122\ 710\]

\[1\ 853 \cdot 80 = 148\ 240\]

\[2\ 405 \cdot 80 = 192\ 400\]

\[3\ 405 \cdot 70 = 238\ 350\]

\[4\ 405 \cdot 60 = 264\ 300\]

\[5\ 405 \cdot 50 = 270\ 250\]

\[6\ 405 \cdot 40 = 256\ 200\]

\[7\ 405 \cdot 30 = 222\ 150\]

\[8\ 405 \cdot 20 = 168\ 100\]

\[3)\ 39\ 160\ :20 = 1958\]

\[38\ 160\ :20 = 1908\]

\[37\ 160\ :20 = 1858\]

\[36\ 160\ :20 = 1808\]

\[35\ 160\ :20 = 1758\]

\[34\ 160\ :20 = 1708\]

\[33\ 160\ :20 = 1658\]

\[127\ 900\ :50 = 2558\]

\[137\ 900\ :50 = 2758\]

\[147\ 900\ :50 = 2958\]

\[157\ 900\ :50 = 3158\]

\[167\ 900\ :50 = 3358\]

\[177\ 900\ :50 = 3558\]

\[187\ 900\ :50 = 3758\]