The document contains mathematical operations including multiplication, addition and subtraction. Numbers are being operated on, with the results being other numbers. The operations are being written out with numbers, operators such as X and +, and equal signs.

1. By David Cruz
Period 6

2. 3
2 X 8X 4 4
16 4
3
64 4

3. 7X 8 6 18 X 3
1
56 3
3
56 1 55

4. 2
15 2 3 6
15 2 9 6
15 18 6
15 3
12