\[Страница\ 61.\]
\[\boxed{\mathbf{30.}}\]
\[Запиши\ только\ ответы\]
\[(слева\ направо):\]
\[12;\ \ 28;\ \ 16;\ \ 36;\ \ 32.\]
\[\boxed{\mathbf{31.}}\]
\[4 \cdot 8 = 32\]
\[7 \cdot 4 = 28\]
\[4 \cdot 3 = 12\]
\[20\ :4 = 5\]
\[36\ :9 = 4\]
\[16\ :4 = 4\]
\[4 \cdot 6 + 50 = 24 + 50 = 74\]
\[12\ :4 - 3 = 3 - 3 = 0\]
\[9 \cdot 2 + 42 = 18 + 42 = 60\]
\[\boxed{\mathbf{32.}}\]
\[1)\ 80 - (54 - 4) = 80 - 50 = 30\]
\[2)\ 9 \cdot 4 + 20 = 36 + 20 = 56\]
\[3)\ 32\ :8 = 4\]
\[4)\ (6 + 3) \cdot 3 = 9 \cdot 3 = 27\]
\[\boxed{\mathbf{33.}}\]
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\[(слева\ направо):\]
\[2;\ \ 4;\ \ 9;\ \ 4;\ \ 7;\ \ 4.\]