Follow up maths

Follow up maths

1. 6 + 2 + 4 = 6 + 4 = 10 + 2 = 12
2. 8 + 5 + 2 = 8 + 2 = 10 + 5 = 15
3. 8 + 1 + 9 + 2 = 8 + 2 = 10 +9 = 19 + 1 = 20
4. 1 + 5 + 5 + 9 = 5 + 5 = 10 + 1 = 11 + 9 = 20
5. 4 + 6 + 4 + 9 + 6 = 6 + 4 = 10 + 6 = 16 + 4 = 20 + 9 = 29

I am learning to add three or more numbers by first making up pairs that add up to 10.