Решебник по математике 5 класс Ерина Виленкин рабочая тетрадь Часть 1, 2 Часть 1 | Страница 94

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\[\textbf{а)}\ 800\ :25 = 8 \cdot 100\ :25 =\]

\[= 8 \cdot 4 = 32\]

\[32 \cdot 20 = 640\]

\[640 - 410 = 230\]

\[230\ :10 = 23\]

\[23 \cdot 5 = 115\]

\[\textbf{б)}\ 441 + 209 = 650\]

\[650 - 160 = 490\]

\[490\ :7 = 70\]

\[70 \cdot 5 = 350\]

\[350\ :35 = 10\]

\[10 \cdot 7 = 70\]

\[\textbf{в)}\ 47\ 000 + 29\ 000 = 76\ 000\]

\[76\ 000\ :1900 = 760\ :19 = 40\]

\[40 \cdot 25 = 1000\]

\[1000 - 999 = 1\]

\[\textbf{г)}\ 40\ 000 - 22\ 900 = 17\ 100\]

\[17\ 100\ :900 = 171\ :9 = 19\]

\[19 \cdot 140 = 2660\]

\[2660 + 520 = 3180\]

\[\textbf{д)}\ 96\ 000\ :3200 = 960\ :32 =\]

\[= 30\]

\[30 \cdot 27 = 810\]

\[810 + 90 = 900\]

\[900\ :6 = 150\]

\[\textbf{е)}\ 15\ 000\ :6 = 2500\]

\[2500 \cdot 4 = 10\ 000\]

\[10\ 000\ :5 = 2000\]

\[2000 \cdot 7 = 14\ 000\]

## Часть 2