Условие:
1. 4*9
2. 7*9
3. 9*8
4. 8*7
5. 6*9
6. 28:4
7. 63:7
8. 72:8
9. 56:7
10. 64:8
11. 30:6
12. 60:3
13. 80:80
14. 50*10
15. 47*0
Решение:
\[\boxed{\mathbf{1.}}\]
\[4 \cdot 9 = 36\]
\[\boxed{\mathbf{2.}}\]
\[7 \cdot 9 = 63\]
\[\boxed{\mathbf{3.}}\]
\[9 \cdot 8 = 72\]
\[\boxed{\mathbf{4.}}\]
\[8 \cdot 7 = 56\]
\[\boxed{\mathbf{5.}}\]
\[6 \cdot 9 = 54\]
\[\boxed{\mathbf{6.}}\]
\[28\ :4 = 7\]
\[\boxed{\mathbf{7.}}\]
\[63\ :7 = 9\]
\[\boxed{\mathbf{8.}}\]
\[72\ :8 = 9\]
\[\boxed{\mathbf{9.}}\]
\[56\ :7 = 8\]
\[\boxed{\mathbf{10.}}\]
\[64\ :8 = 8\]
\[\boxed{\mathbf{11.}}\]
\[30\ :6 = 5\]
\[\boxed{\mathbf{12.}}\]
\[60\ :3 = 20\]
\[\boxed{\mathbf{13.}}\]
\[80\ :80 = 1\]
\[\boxed{\mathbf{14.}}\]
\[50 \cdot 10 = 500\]
\[\boxed{\mathbf{15.}}\]
\[47 \cdot 0 = 0\]