Add: 2 + 1

What is 2 + 1?
What is 2 plus 1?
Addition 3 4 5 6 7
2 3+2 = 5 4+2 = 6 5+2 = 7 6+2 = 8 7+2 = 9
3 3+3 = 6 4+3 = 7 5+3 = 8 6+3 = 9 7+3 = 10
4 3+4 = 7 4+4 = 8 5+4 = 9 6+4 = 10 7+4 = 11
5 3+5 = 8 4+5 = 9 5+5 = 10 6+5 = 11 7+5 = 12
6 3+6 = 9 4+6 = 10 5+6 = 11 6+6 = 12 7+6 = 13
Addition 2.1 2.2 2.3 2.4 2.5
1.1 2.1+1.1 = 3.2 2.2+1.1 = 3.3 2.3+1.1 = 3.4 2.4+1.1 = 3.5 2.5+1.1 = 3.6
1.2 2.1+1.2 = 3.3 2.2+1.2 = 3.4 2.3+1.2 = 3.5 2.4+1.2 = 3.6 2.5+1.2 = 3.7
1.3 2.1+1.3 = 3.4 2.2+1.3 = 3.5 2.3+1.3 = 3.6 2.4+1.3 = 3.7 2.5+1.3 = 3.8
1.4 2.1+1.4 = 3.5 2.2+1.4 = 3.6 2.3+1.4 = 3.7 2.4+1.4 = 3.8 2.5+1.4 = 3.9
1.5 2.1+1.5 = 3.6 2.2+1.5 = 3.7 2.3+1.5 = 3.8 2.4+1.5 = 3.9 2.5+1.5 = 4