Решебник по математике 5 класс Мерзляк ФГОС Задание 458

 

\[\boxed{\ \mathbf{458\ (458)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]

\[1)\ 19x = 95\]

\[x = 95\ :19\]

\[x = 5\]

\[Ответ:5.\]

\[2)\ x \cdot 22 = 132\]

\[x = 132\ :22\]

\[x = 6\]

\[Ответ:6.\]

\[3)\ 38x - 16x = 1474\]

\[22x = 1474\]

\[x = 67\]

\[Ответ:67.\]

\[4)\ y + 27y = 952\]

\[28y = 952\]

\[y = 952\ :28\]

\[y = 34\]

\[Ответ:34.\]

\[5)\ x\ :25 = 16\]

\[x = 16 \cdot 25\]

\[x = 400.\]

\[Ответ:400.\]

\[6)\ 324\ :x = 27\]

\[x = 324\ :27\]

\[x = 12\]

\[Ответ:12.\]

\[\boxed{\ \mathbf{458\ (420)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]

\[1)\ 2 \cdot 328 \cdot 5 = 328 \cdot (2 \cdot 5) =\]

\[= 328 \cdot 10 = 3280\]

\[2)\ 125 \cdot 43 \cdot 8 = (125 \cdot 8) \cdot 43 =\]

\[= 1000 \cdot 43 = 43\ 000\]

\[3)\ 25 \cdot 243 \cdot 4 = (25 \cdot 4) \cdot 243 =\]

\[= 100 \cdot 243 = 24\ 300\]

\[4)\ 4 \cdot 36 \cdot 5 = (4 \cdot 5) \cdot 36 =\]

\[= 20 \cdot 36 = 720\]

\[5)\ 50 \cdot 236 \cdot 2 = (50 \cdot 2) \cdot 236 =\]

\[= 100 \cdot 236 = 23\ 600\]

\[6)\ 250 \cdot 3 \cdot 4 = (250 \cdot 4) \cdot 3 =\]

\[= 1000 \cdot 3 = 3000\]