Условие:
1. 6*8
2. 9*7
3. 7*6
4. 8*8
5. 6*9
6. 27:9
7. 72:8
8. 28:4
9. 42:7
10. 63:9
11. 48:8
12. 120:6
13. 72:72
14. 400*10
15. 97*0
Решение:
\[\boxed{\mathbf{1.}}\]
\[6 \cdot 8 = 48\]
\[\boxed{\mathbf{2.}}\]
\[9 \cdot 7 = 63\]
\[\boxed{\mathbf{3.}}\]
\[7 \cdot 6 = 42\]
\[\boxed{\mathbf{4.}}\]
\[8 \cdot 8 = 64\]
\[\boxed{\mathbf{5.}}\]
\[6 \cdot 9 = 56\]
\[\boxed{\mathbf{6.}}\]
\[27\ :9 = 3\]
\[\boxed{\mathbf{7.}}\]
\[72\ :8 = 9\]
\[\boxed{\mathbf{8.}}\]
\[28\ :4 = 7\]
\[\boxed{\mathbf{9.}}\]
\[42\ :7 = 6\]
\[\boxed{\mathbf{10.}}\]
\[63\ :9 = 7\]
\[\boxed{\mathbf{11.}}\]
\[48\ :8 = 6\]
\[\boxed{\mathbf{12.}}\]
\[120\ :6 = 20\]
\[\boxed{\mathbf{13.}}\]
\[72\ :72 = 1\]
\[\boxed{\mathbf{14.}}\]
\[400 \cdot 10 = 4000\]
\[\boxed{\mathbf{15.}}\]
\[97 \cdot 0 = 0\]