P. Addition Practice with Tens
- 1 + 9 = 10 + 90 =
- = 4 + 6 = 40 + 60
- 7 + 3 = 70 + 30 =
- 2 + 9 = = 90 + 20
- 5 + 5 = 500 + 500 =
- 5 + 6 = 500 + 600 =
- 7 + 4 = 40 + 70 =
- 8 + 3 = 80 + 30 =