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Part 1
The temperature at the beginning of the day was negative 7degreesUpper C. The temperature dropped 2degreesUpper C by the end of the day. What was the temperature at the end of the​ day? Use the number line model to find negative 7minus2.

To solve this, we need to calculate the new temperature at the end of the day based on the given information. Let's break this down step by step:

1. **Initial Temperature**: The temperature at the beginning of the day was -7°C.
2. **Temperature Drop**: The temperature dropped by 2°C.

We need to find the final temperature using the equation: 
\[
-7 - 2
\]

### Visualizing on a Number Line:
- Start at **-7** on the number line.
- To subtract 2, we move **2 units to the left** (since we're subtracting).
  
This gives us:
\[
-7 - 2 = -9
\]

### Conclusion:
The temperature at the end of the day was **-9°C**.

Would you like a more detailed explanation of the number line or have any questions?

Here are 5 related questions for further understanding:
1. How do you subtract positive and negative numbers on a number line?
2. What happens when you subtract a negative number from another negative number?
3. Can temperature ever be below -273°C, and why not?
4. How would adding a number to a negative temperature affect the result?
5. How does the concept of absolute zero relate to temperature scales?

**Tip:** When subtracting numbers on the number line, always move left for subtraction and right for addition!

The temperature at the beginning of the day was negative 7°C. The temperature dropped 2°C by the end of the day. What was the temperature at the end of the day? Use the number line model to find -7 - 2.

Learn how to subtract integers using a number line with this detailed example. Starting from -7°C and subtracting 2°C, discover how to visualize the calculation on a number line and find the final temperature of -9°C. This problem is perfect for students in Grades 5-7, covering integer arithmetic and number line concepts.

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