Examples of tens and units?

Tens: 10, 20, 30, 40, 50, 60, 70, 80, 90
Units: 1, 2, 3, 4, 5, 6, 7, 8, 9

- 20 (two tens)
- 30 (three tens)
- 40 (four tens)
- 50 (five tens)
- 60 (six tens)
- 70 (seven tens)
- 80 (eight tens)
- 90 (nine tens)
- 11 (one ten and one)
- 12 (one ten and two)
- 13 (one ten and three)
- 14 (one ten and four)
- 25 (two tens and five)