Problem Analysis:
The task involves converting cardinal numbers (e.g., 1, 2, 3) into their corresponding ordinal numbers (e.g., 1st, 2nd, 3rd). The provided table in the image lists some examples of cardinal and ordinal numbers. The goal is to fill in the missing ordinal numbers for the given cardinal numbers.
Steps to Solve:
1.
Understand Ordinal Numbers:
- Ordinal numbers are used to indicate the position or order of things.
- Examples: 1st (first), 2nd (second), 3rd (third), etc.
2.
Identify Patterns:
- For most numbers, the suffix "-th" is added to the cardinal number to form the ordinal number (e.g., 4 → 4th).
- Special cases:
- 1 → 1st (first)
- 2 → 2nd (second)
- 3 → 3rd (third)
- Numbers ending in 1 (except 11) use "-st" (e.g., 21 → 21st).
- Numbers ending in 2 (except 12) use "-nd" (e.g., 22 → 22nd).
- Numbers ending in 3 (except 13) use "-rd" (e.g., 23 → 23rd).
- All other numbers use "-th" (e.g., 4 → 4th, 14 → 14th).
3.
Apply the Rules:
- Use the patterns above to convert each cardinal number into its ordinal form.
Solution:
#### Given Cardinal Numbers:
- \( 10 \)
- \( 100 \)
- \( 1000 \)
- \( 10000 \)
- \( 100000 \)
- \( 1000000 \)
#### Conversion to Ordinal Numbers:
1.
10:
- Ends in "0", so use "-th".
-
Ordinal: 10th
2.
100:
- Ends in "00", so use "-th".
-
Ordinal: 100th
3.
1000:
- Ends in "000", so use "-th".
-
Ordinal: 1000th
4.
10000:
- Ends in "0000", so use "-th".
-
Ordinal: 10000th
5.
100000:
- Ends in "00000", so use "-th".
-
Ordinal: 100000th
6.
1000000:
- Ends in "000000", so use "-th".
-
Ordinal: 1000000th
Final Answer:
\[
\boxed{
\begin{array}{c|c}
\text{Cardinal Number} & \text{Ordinal Number} \\
\hline
10 & 10^{\text{th}} \\
100 & 100^{\text{th}} \\
1000 & 1000^{\text{th}} \\
10000 & 10000^{\text{th}} \\
100000 & 100000^{\text{th}} \\
1000000 & 1000000^{\text{th}}
\end{array}
}
\]
Explanation:
- Each number ends in multiple zeros, so the general rule is to append "-th" to the cardinal number.
- This pattern holds consistently for large numbers like 10, 100, 1000, etc.
Parent Tip: Review the logic above to help your child master the concept of esl ordinal numbers worksheet.
