A has 15 non-zero entries:
1: (1, 8596.3) (4, 5830.3) 
2: (4, -6315.9) 
3: (1, -3013.9) 
4: (5, -9229.6) (7, -2402.8) 
5: (1, -1114.8) (7, -9982.4) 
6: (4, 5568.6) (5, -3604.1) (7, 8095.4) 
7: (9, -644.5) 
8: (7, 1820.5) (8, -4961.3) (9, 9063.2) 

B has 12 non-zero entries:
1: (2, 835.0) 
2: (10, -872.5) 
3: (5, -5437.9) (8, 9269.1) 
4: (8, 6786.0) 
5: (2, 816.8) 
6: (3, 848.7) 
7: (1, -8517.1) (3, 2903.1) 
8: (9, 3664.7) 
9: (10, -2108.5) 
10: (4, 9159.8) 

(1.5)*A =
1: (1, 12894.4) (4, 8745.5) 
2: (4, -9473.8) 
3: (1, -4520.9) 
4: (5, -13844.4) (7, -3604.2) 
5: (1, -1672.2) (7, -14973.6) 
6: (4, 8352.9) (5, -5406.1) (7, 12143.1) 
7: (9, -966.8) 
8: (7, 2730.8) (8, -7442.0) (9, 13594.8) 

A+B =
1: (1, 8596.3) (2, 835.0) (4, 5830.3) 
2: (4, -6315.9) (10, -872.5) 
3: (1, -3013.9) (5, -5437.9) (8, 9269.1) 
4: (5, -9229.6) (7, -2402.8) (8, 6786.0) 
5: (1, -1114.8) (2, 816.8) (7, -9982.4) 
6: (3, 848.7) (4, 5568.6) (5, -3604.1) (7, 8095.4) 
7: (1, -8517.1) (3, 2903.1) (9, -644.5) 
8: (7, 1820.5) (8, -4961.3) (9, 12727.9) 
9: (10, -2108.5) 
10: (4, 9159.8) 

A+A =
1: (1, 17192.6) (4, 11660.6) 
2: (4, -12631.8) 
3: (1, -6027.8) 
4: (5, -18459.2) (7, -4805.6) 
5: (1, -2229.6) (7, -19964.8) 
6: (4, 11137.2) (5, -7208.2) (7, 16190.8) 
7: (9, -1289.0) 
8: (7, 3641.0) (8, -9922.6) (9, 18126.4) 

B-A =
1: (1, -8596.3) (2, 835.0) (4, -5830.3) 
2: (4, 6315.9) (10, -872.5) 
3: (1, 3013.9) (5, -5437.9) (8, 9269.1) 
4: (5, 9229.6) (7, 2402.8) (8, 6786.0) 
5: (1, 1114.8) (2, 816.8) (7, 9982.4) 
6: (3, 848.7) (4, -5568.6) (5, 3604.1) (7, -8095.4) 
7: (1, -8517.1) (3, 2903.1) (9, 644.5) 
8: (7, -1820.5) (8, 4961.3) (9, -5398.5) 
9: (10, -2108.5) 
10: (4, 9159.8) 

A-A =

Transpose(A) =
1: (1, 8596.3) (3, -3013.9) (5, -1114.8) 
4: (1, 5830.3) (2, -6315.9) (6, 5568.6) 
5: (4, -9229.6) (6, -3604.1) 
7: (4, -2402.8) (5, -9982.4) (6, 8095.4) (8, 1820.5) 
8: (8, -4961.3) 
9: (7, -644.5) (8, 9063.2) 

A*B =
1: (2, 7177910.5) (8, 39564415.8) 
2: (8, -42859697.4) 
3: (2, -2516606.5) 
4: (1, 20464887.9) (2, -7538737.3) (3, -6975568.7) 
5: (1, 85021099.0) (2, -930858.0) (3, -28979905.4) 
6: (1, -68949331.3) (2, -2943828.9) (3, 23501755.7) (8, 37788519.6) 
7: (10, 1358928.2) 
8: (1, -15505380.6) (3, 5285093.5) (9, -18181676.1) (10, -19109757.2) 

B*B =
1: (10, -728537.5) 
2: (4, -7991925.5) 
3: (2, -4441676.7) (9, 33968470.8) 
4: (9, 24868654.2) 
5: (10, -712658.0) 
6: (5, -4615145.7) (8, 7866685.2) 
7: (2, -7111778.5) (5, -15786767.5) (8, 26909124.2) 
8: (10, -7727019.9) 
9: (4, -19313438.3) 
10: (8, 62158402.8)