Additions - Castle 1a - Free Printable

I'll solve this "Additions - Castle" problem step by step.

First, let me understand what the task is asking:
- I need to draw extra parts on the castle
- Each part has a specific value (shown in the key at the bottom)
- The total value of all added parts should equal 20

Let me examine the values for each part:
- Door: 3
- Arrow slit (small black rectangle): 1
- Flag: 1
- Window (with bars): 4
- Arched window: 2
- Banner/flagpole: 2

Now I need to find a combination of these parts that adds up to 20. Let me think about possible combinations:

One approach would be to use multiple parts with higher values first:
- 5 windows (each worth 4) = 20 (but this might be too many and not visually balanced)
- 4 windows (4×4=16) + 2 banners (2×2=4) = 20
- 3 windows (3×4=12) + 4 doors (4×3=12) = 24 (too much)
- 3 windows (3×4=12) + 2 doors (2×3=6) + 2 arrow slits (2×1=2) = 20

The last combination seems reasonable: 3 windows, 2 doors, and 2 arrow slits.

I could also try:
- 2 windows (2×4=8) + 4 doors (4×3=12) = 20

This is also a valid combination.

Let me go with the simpler combination of 2 windows and 4 doors, as it uses fewer different types of parts.

To solve this, I would draw:
- 2 additional windows (each worth 4, total 8)
- 4 additional doors (each worth 3, total 12)

8 + 12 = 20 ✓

This satisfies the requirement that the total value of added parts equals 20.

Note: Since I can't actually draw on the image, I'm providing the solution conceptually. In practice, you would add these parts to the castle drawing in appropriate locations (e.g., adding windows to blank wall sections and doors to suitable positions).