\[Страница\ 6.\]
\[\boxed{\mathbf{6}.}\]
\[62 + 8 = 70\ (Л)\]
\[154\ :2 = 77\ (К)\]
\[91\ :13 = 7\ (Ы)\]
\[4600 + 900 = 5500\ (С)\]
\[5200 - 700 = 4500\ (Е)\]
\[71 + 19 = 90\ (А)\]
\[270\ :10 + 680\ :10 =\]
\[= 27 + 68 = 95\ (О)\]
\[72\ :12 + 178 = 6 + 178 =\]
\[= 184\ (Б)\]
\[60 \cdot 7 - 90 \cdot 3 = 420 - 270 =\]
\[= 150\ (Р)\]
\[600 \cdot 3 - 16 \cdot 5 = 1800 - 80 =\]
\[1720\ (Т)\]