1. BY

3. 98 X 99 = ????

4. 9 9
9 8
2
781 +
8 8
28 8 +
9 7 0 2

6. 98 99X =
98 - 100
-2
99 - 100
-1
9 7
X
0 2

7. 998 X 995 =
????

8. 998 X 995 =
998 - 1000
- 2
995 - 1000
-5
9 9 3
X
010

9. 104 X 106 =
?????

10. 104 X 106 =
104 - 100
+4
106 - 100
+6
1 1 0
X
2 4

11. BLACK HOLE