Adding 1-digit numbers
3+5
What is 8
12+12
What is 24
100+100
What is 200
1111+2222
What is 3333
324+12+222
What is 558
3+4
What is 7
24+12
What is 36
301+213
What is 514
1234+1234
What is 2468
123+123+123
What is 369
What is 11
34+45
What is 79
345+234
What is 579
1234+5678
What is 6912
123+234+345
What is 702
What is 12
45+78
What is 123
765+948
What is 1713
2468+1357
What is 3825
386+897+4567
What is 5850
9+9
What is 18
What is 198
898+989
What is 1887
9898+8989
What is 18887
9999+9898+8888
What is 29895