Free Printable Decimals Worksheets for Kids | SplashLearn - Free Printable

Problem Analysis:

The task involves arranging decimals in either descending order (from largest to smallest) or ascending order (from smallest to largest). We will solve each part step by step.

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Part 1: Arrange the decimals in descending order.

The given decimals are:
- 5.55
- 6.67
- 1.11

#### Steps:
1. Compare the numbers to determine their relative sizes.
- 6.67 is the largest.
- 5.55 is the second largest.
- 1.11 is the smallest.

2. Arrange them in descending order (largest to smallest):
- 6.67, 5.55, 1.11

#### Final Answer for Part 1:
$$
\boxed{6.67, 5.55, 1.11}
$$

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Part 2: Arrange the decimals in ascending order.

The given decimals are:
- 7.78
- 5.37
- 3.22

#### Steps:
1. Compare the numbers to determine their relative sizes.
- 3.22 is the smallest.
- 5.37 is the second smallest.
- 7.78 is the largest.

2. Arrange them in ascending order (smallest to largest):
- 3.22, 5.37, 7.78

#### Final Answer for Part 2:
$$
\boxed{3.22, 5.37, 7.78}
$$

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Part 3: Arrange the decimals in descending order.

The given decimals are:
- 3.12
- 8.09
- 6.67

#### Steps:
1. Compare the numbers to determine their relative sizes.
- 8.09 is the largest.
- 6.67 is the second largest.
- 3.12 is the smallest.

2. Arrange them in descending order (largest to smallest):
- 8.09, 6.67, 3.12

#### Final Answer for Part 3:
$$
\boxed{8.09, 6.67, 3.12}
$$

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Summary of All Answers:

1. Descending order: \( \boxed{6.67, 5.55, 1.11} \)
2. Ascending order: \( \boxed{3.22, 5.37, 7.78} \)
3. Descending order: \( \boxed{8.09, 6.67, 3.12} \)

These solutions are derived by carefully comparing the decimal values and arranging them according to the specified order (descending or ascending).