Negative Numbers on the Number Line

Description

Introduces negative numbers by showing a number line from -10 to +10 and demonstrating that numbers extend to the left of zero. Students see that negative and positive numbers are mirror images, then practice addition and subtraction using animated hops.

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Phases

#	Phase Name	Duration	Description
1	Number Line Intro	6s	Draw the number line from -10 to +10 with tick marks and labels. Highlight zero.
2	Mirror Images	8s	Place +3 (blue dot) and -3 (red dot). Draw a dashed mirror line at zero. Animate both dots appearing symmetrically.
3	Addition with Negatives	10s	Start at 5 (blue), hop left 3 times to show 5 + (-3) = 2. Label each hop.
4	Subtraction Across Zero	8s	Start at 2, hop left 5 steps to show 2 - 5 = -3. Land on red zone.
5	Summary	6s	Show key takeaways: negative numbers are left of zero, subtraction can cross zero.

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Layout

+------------------------------------------------------+
|                                                      |
|   [Title: Negative Numbers on the Number Line]       |
|                                                      |
|   <----+----+----+----+--0--+----+----+----+---->    |
|       -10  -8   -6   -4   -2    2    4    6    8    |
|                                                      |
|   [Formula / equation display]                       |
|   [Phase label / annotation]                         |
|                                                      |
+------------------------------------------------------+

Area Descriptions

Area	Content	Notes
Top	Title text	Fades in at start
Center	Number line	Persistent through animation
Center overlays	Colored dots, hop arcs	Red = negative, Blue = positive
Bottom	Equations and annotations	Updates each phase

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Assets & Dependencies

• Fonts: LaTeX / sans-serif
• Colors:
  • Positives: BLUE (#3B82F6)
  • Negatives: RED (#EF4444)
  • Zero: YELLOW (#F59E0B)
  • Number line: WHITE
  • Background: #1a1a2e
• Manim version: ManimCE 0.19.1

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Notes

• Hops are arc-shaped (CurvedArrow or Arc) drawn above the number line.
• The mirror dashed line at zero visually reinforces symmetry.
• Audience: ages 11-14; keep language simple in on-screen text.