\[\boxed{\text{П.109.}}\]
| \[1\] | \[2\] | \[3\] | \[4\] |
|---|---|---|---|
| \[5\] | \[6\] | \[7\] | \[8\] |
| \[9\] | \[10\] | \[11\] | \[12\] |
| \[13\] | \[14\] | \[15\] | \[16\] |
\[\textbf{а)}\ 1 + 5 + 9 + 13 = 28.\ \]
\[\textbf{б)}\ 3 + 7 + 11 + 15 = 36.\ \]
\[\textbf{в)}\ 1 + 6 + 11 + 16 = 34;\ \]
\[4 + 7 + 10 + 13 = 34.\ \]