Subtracting Integers  Two Digits 

100What is 111
888999

100What is 336
28x12

200What is 37
9721,009

200What is 144
12x12

300What is 354
594948

300What is 323
17x19

400What is 5,019
9215,940

400What is 3640
65x56

500What is 1
9991,000
