11/16，15/13，12/17，8/7，3/5，（   ）
A.1
B.4/5
C.3/8
D.2/3


To solve this problem, we need to identify a pattern among the given fractions: \( \frac{11}{16} \), \( \frac{15}{13} \), \( \frac{12}{17} \), \( \frac{8}{7} \), \( \frac{3}{5} \).

Let's analyze each fraction:

1. \( \frac{11}{16} \approx 0.6875 \)
2. \( \frac{15}{13} \approx 1.1538 \)
3. \( \frac{12}{17} \approx 0.7059 \)
4. \( \frac{8}{7} \approx 1.1429 \)
5. \( \frac{3}{5} = 0.6 \)

The fractions alternate between values slightly less than 1 and values slightly greater than 1.

- The first fraction \( \frac{11}{16} \) is less than 1.
- The second fraction \( \frac{15}{13} \) is greater than 1.
- The third fraction \( \frac{12}{17} \) is less than 1.
- The fourth fraction \( \frac{8}{7} \) is greater than 1.
- The fifth fraction \( \frac{3}{5} \) is less than 1.

Following this pattern, the missing fraction should be greater than 1.

Let's examine the given options:

- A. \( 1 = 1 \)
- B. \( \frac{4}{5} = 0.8 \) (less than 1)
- C. \( \frac{3}{8} = 0.375 \) (less than 1)
- D. \( \frac{2}{3} \approx 0.6667 \) (less than 1)

The only value that satisfies the pattern (greater than 1) is option **A. 1**.

Thus, the correct answer is **A. 1**.

Would you like to know more details, or do you have any questions?

Here are five related questions you might find interesting:
1. What is the decimal approximation of \( \frac{9}{11} \)?
2. How can you quickly determine whether a fraction is greater or less than 1?
3. What is the pattern in a sequence of fractions if they alternate between increasing and decreasing?
4. How would you determine the next term in a sequence if all terms are fractions?
5. What is the significance of recognizing patterns in a sequence of numbers?

**Tip:** When solving pattern recognition problems, look for alternating trends or repeating sequences in the given set of numbers or fractions.

11/16，15/13，12/17，8/7，3/5，（ ） A.1 B.4/5 C.3/8 D.2/3

Solve a fraction sequence pattern recognition problem involving fractions like 11/16, 15/13, and more. Learn how to use decimal approximations and alternating patterns to identify the missing term. Suitable for Grades 5-7.

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