1.
1100-911= 189
1100+725=1825
1100-748=352
1100+ 795=1895
1100-683=417
1100+386=1486
1100-597=503
1100+836=1936
2.
2000-925=1075
2000+826=2826
2000-789=1211
2000+667=2667
2000-564=1436
2000+619=2619
2000-742=1258
2000+827=2827
3.
2100+773=2873
2100- 377=1723
2100+984=3084
2100-566=1534
2100+517=2617
2100-711=1389
2100+865=2965
2100-489=1611