Addition with regrouping
2416 + 2137=
4553
2387
9021
1876
783 + 226
1008
1009
1010
1011
7664 + 1622 =
7654
9286
1097
7683
5483 + 1036 =
6519
5643
7654
9087
5673 + 1048
1190
6721
8765
9807
6537 + 2233 =
9300
8300
8770
3456