Add: 4 + 15

What is 4 + 15?
What is 4 plus 15?
Addition 5 6 7 8 9
16 5+16 = 21 6+16 = 22 7+16 = 23 8+16 = 24 9+16 = 25
17 5+17 = 22 6+17 = 23 7+17 = 24 8+17 = 25 9+17 = 26
18 5+18 = 23 6+18 = 24 7+18 = 25 8+18 = 26 9+18 = 27
19 5+19 = 24 6+19 = 25 7+19 = 26 8+19 = 27 9+19 = 28
20 5+20 = 25 6+20 = 26 7+20 = 27 8+20 = 28 9+20 = 29
Addition 4.1 4.2 4.3 4.4 4.5 4.6
15.1 4.1+15.1 = 19.2 4.2+15.1 = 19.3 4.3+15.1 = 19.4 4.4+15.1 = 19.5 4.5+15.1 = 19.6 4.6+15.1 = 19.7
15.2 4.1+15.2 = 19.3 4.2+15.2 = 19.4 4.3+15.2 = 19.5 4.4+15.2 = 19.6 4.5+15.2 = 19.7 4.6+15.2 = 19.8
15.3 4.1+15.3 = 19.4 4.2+15.3 = 19.5 4.3+15.3 = 19.6 4.4+15.3 = 19.7 4.5+15.3 = 19.8 4.6+15.3 = 19.9
15.4 4.1+15.4 = 19.5 4.2+15.4 = 19.6 4.3+15.4 = 19.7 4.4+15.4 = 19.8 4.5+15.4 = 19.9 4.6+15.4 = 20
15.5 4.1+15.5 = 19.6 4.2+15.5 = 19.7 4.3+15.5 = 19.8 4.4+15.5 = 19.9 4.5+15.5 = 20 4.6+15.5 = 20.1
15.6 4.1+15.6 = 19.7 4.2+15.6 = 19.8 4.3+15.6 = 19.9 4.4+15.6 = 20 4.5+15.6 = 20.1 4.6+15.6 = 20.2