Measuring Units of Length worksheet for Class 4 with a ruler and school supplies.

Problem Analysis:

The task involves measuring the lengths of various objects using a ruler and answering questions based on their relative sizes. Let's analyze the image and solve each part step by step.

#### Observations from the Image:
1. Ruler: The ruler is marked in centimeters (cm).
2. Objects:
- Pencil: Approximately 13 cm long.
- Scissors: Approximately 10 cm long.
- Stapler: Approximately 8 cm long.
- Sharpener: Approximately 4 cm long.
- Ribbon: Approximately 15 cm long.

Questions and Solutions:

#### 1. Which two items are equal in length?
- From the image, the pencil and the scissors appear to be approximately the same length (around 10 cm each).
- Answer: Scissors, Pencil

#### 2. How much is sharpener shorter than the scissor?
- Length of scissors: ~10 cm
- Length of sharpener: ~4 cm
- Difference: \( 10 \, \text{cm} - 4 \, \text{cm} = 6 \, \text{cm} \)
- Answer: 6 cm

#### 3. Which item is shorter than pencil but longer than sharpener?
- Pencil: ~13 cm
- Sharpener: ~4 cm
- Objects between these lengths: stapler (~8 cm) and scissors (~10 cm).
- Since the question asks for an item shorter than the pencil but longer than the sharpener, the correct answer is the stapler.
- Answer: Stapler

#### 4. If the length of the pencil is increased by 1 cm, which item becomes the third longest?
- Current lengths:
- Ribbon: ~15 cm
- Pencil: ~13 cm
- Scissors: ~10 cm
- Stapler: ~8 cm
- Sharpener: ~4 cm
- If the pencil is increased by 1 cm, its new length will be \( 13 \, \text{cm} + 1 \, \text{cm} = 14 \, \text{cm} \).
- New order of lengths:
1. Ribbon: 15 cm
2. Pencil: 14 cm
3. Scissors: 10 cm
4. Stapler: 8 cm
5. Sharpener: 4 cm
- The third longest item is now the scissors.
- Answer: Scissors

#### 5. How much is scissors longer than stapler?
- Length of scissors: ~10 cm
- Length of stapler: ~8 cm
- Difference: \( 10 \, \text{cm} - 8 \, \text{cm} = 2 \, \text{cm} \)
- Answer: 2 cm

#### 6. Which item is the longest?
- From the observed lengths:
- Ribbon: ~15 cm
- Pencil: ~13 cm
- Scissors: ~10 cm
- Stapler: ~8 cm
- Sharpener: ~4 cm
- The longest item is the ribbon.
- Answer: Ribbon

#### 7. If the length of the ribbon is decreased by 2 cm, is it still longer than the scissor?
- Current length of ribbon: ~15 cm
- Decreased length of ribbon: \( 15 \, \text{cm} - 2 \, \text{cm} = 13 \, \text{cm} \)
- Length of scissors: ~10 cm
- After decreasing the ribbon by 2 cm, its length (13 cm) is still greater than the length of the scissors (10 cm).
- Answer: Yes

Final Answers:

1. Scissors, Pencil
2. 6 cm
3. Stapler
4. Scissors
5. 2 cm
6. Ribbon
7. Yes

\boxed{
\begin{array}{l}
\text{1. Scissors, Pencil} \\
\text{2. 6 cm} \\
\text{3. Stapler} \\
\text{4. Scissors} \\
\text{5. 2 cm} \\
\text{6. Ribbon} \\
\text{7. Yes}
\end{array}
}