Add: 1 + 15

What is 1 + 15?
What is 1 plus 15?
Addition 2 3 4 5 6
16 2+16 = 18 3+16 = 19 4+16 = 20 5+16 = 21 6+16 = 22
17 2+17 = 19 3+17 = 20 4+17 = 21 5+17 = 22 6+17 = 23
18 2+18 = 20 3+18 = 21 4+18 = 22 5+18 = 23 6+18 = 24
19 2+19 = 21 3+19 = 22 4+19 = 23 5+19 = 24 6+19 = 25
20 2+20 = 22 3+20 = 23 4+20 = 24 5+20 = 25 6+20 = 26
Addition 1.1 1.2 1.3 1.4 1.5
15.1 1.1+15.1 = 16.2 1.2+15.1 = 16.3 1.3+15.1 = 16.4 1.4+15.1 = 16.5 1.5+15.1 = 16.6
15.2 1.1+15.2 = 16.3 1.2+15.2 = 16.4 1.3+15.2 = 16.5 1.4+15.2 = 16.6 1.5+15.2 = 16.7
15.3 1.1+15.3 = 16.4 1.2+15.3 = 16.5 1.3+15.3 = 16.6 1.4+15.3 = 16.7 1.5+15.3 = 16.8
15.4 1.1+15.4 = 16.5 1.2+15.4 = 16.6 1.3+15.4 = 16.7 1.4+15.4 = 16.8 1.5+15.4 = 16.9
15.5 1.1+15.5 = 16.6 1.2+15.5 = 16.7 1.3+15.5 = 16.8 1.4+15.5 = 16.9 1.5+15.5 = 17
15.6 1.1+15.6 = 16.7 1.2+15.6 = 16.8 1.3+15.6 = 16.9 1.4+15.6 = 17 1.5+15.6 = 17.1