ГДЗ по математике 6 класс Мерзляк ФГОС Задание 86

\[\boxed{\mathbf{86}.}\]

\[1)\ 374 + x\]

\[x = 268:\]

\[374 + 268 = 642.\]

\[2)\ y\ :27 + 33\]

\[y = 729:\]

\[729\ :27 + 33 = 27 + 33 = 60.\]

\[3)\ 84n - m\]

\[n = 5;\ \ m = 355:\]

\[84 \cdot 5 - 355 = 420 - 355 = 65.\]

\[4)\ 5a^{3} + 1\]

\[a = 4:\]

\[5 \cdot 4^{3} + 1 = 5 \cdot 64 + 1 =\]

\[= 320 + 1 = 321.\]