Understanding the differences between teen numbers and numbers in the twenties is an essential part of learning basic numeracy. This lesson will help you distinguish between the two categories clearly.
What Are Teen Numbers?
Teen numbers are the numbers from 13 to 19. They are defined by the '-teen' suffix and share a base number with their corresponding unit numbers. Here they are:
- 13 (thirteen)
- 14 (fourteen)
- 15 (fifteen)
- 16 (sixteen)
- 17 (seventeen)
- 18 (eighteen)
- 19 (nineteen)
Each of these numbers indicates that there are 'ten' plus some additional units. For instance:
- 13 is 10 + 3
- 14 is 10 + 4
- 15 is 10 + 5, and so on.
What Are Numbers in the Twenties?
The twenties refer to the numbers from 20 to 29. The defining feature of these numbers is that they start with 'twenty' followed by another digit. Here’s the breakdown:
- 20 (twenty)
- 21 (twenty-one)
- 22 (twenty-two)
- 23 (twenty-three)
- 24 (twenty-four)
- 25 (twenty-five)
- 26 (twenty-six)
- 27 (twenty-seven)
- 28 (twenty-eight)
- 29 (twenty-nine)
In this case, the number 20 can be seen as a complete set of ten plus each following digit, for example:
- 21 is 20 + 1
- 22 is 20 + 2
- 23 is 20 + 3, etc.
Key Differences
- Range: Teen numbers are from 13 to 19, while twenty numbers are from 20 to 29.
- Suffix: Teen numbers end with '-teen', whereas twenties start with 'twenty'.
- Numerical Composition: Teen numbers have a base of 'ten', while twenty numbers have a base of 'twenty'.
Helpful Tips to Remember
- Try to visualize or write down both sets of numbers side by side to see their structure and patterns.
- Use mnemonic devices to remember teen numbers (like 'thirteen' starts with 'thir', 'fourteen' starts with 'four', etc.).
- For the twenties, you might think of 'twenty' as a starting point with the added unit as a suffix (like 'twenty-one', 'twenty-two', etc.).
- Practice by counting aloud or using flashcards to help reinforce memory.
- Engaging in number games can make learning these distinctions more fun and memorable.
By familiarizing yourself with these numbers and practicing regularly, you'll be able to confidently differentiate between teen numbers and those in the twenties!