\[\boxed{\mathbf{Стр.\ 24.\ }еуроки - ответы\ на\ пятёрку}\]
\[\boxed{\mathbf{71.}}\]
\[a\] | \[12\] | \[16\] | \[36\] | \[20\] | \[8\] | \[24\] | \[32\] | \[4\] | \[40\] |
---|---|---|---|---|---|---|---|---|---|
\[a\ :4\] | \[3\] | \[4\] | \[9\] | \[5\] | \[2\] | \[6\] | \[8\] | \[1\] | \[10\] |
\[a - a\ :4\] | \[9\] | \[12\] | \[27\] | \[15\] | \[6\] | \[18\] | \[24\] | \[3\] | \[30\] |
\[\boxed{\mathbf{72.}}\]
\[1)\ 7 \cdot 3 - 2 \cdot 3\]
\[2)\ 7 - 2\]
\[3)\ (7 - 2) \cdot 2\]
\[4)\ 2 \cdot 3\]
\[5)\ 7 \cdot 3 - (7 \cdot 3 - 2 \cdot 3)\ \]
\[\boxed{\mathbf{73.}}\]
\[3 \cdot 4 = 12\ :6 = 2 \cdot 3 = 6 + 26 =\]
\[= 32\ :4 = 8 \cdot 8 = 64 - 60 =\]
\[= 4 \cdot 5 = 20 - 14 = 6.\]