To convert from standard form to ordinary form, move the decimal point according to the exponent. Step 1: Identify the exponent: -3 (negative means move decimal LEFT, making the number smaller). Step 2: Start with 7.2 and move the decimal point 3 places to the LEFT. Moving left: 7.2 → 0.72 → 0.072 → 0.0072. Step 3: Result = 0.0072. Verification: \(7.2 \times 10^{-3} = 7.2 \times 0.001 = 0.0072\) ✓. Rule summary: Positive exponent → move decimal RIGHT (number gets bigger). Negative exponent → move decimal LEFT (number gets smaller). In ECZ exams, you may need to convert to ordinary form for final answers, especially in word problems where the context requires a 'normal' number. For instance, if calculating a measurement in meters, you might compute in standard form but express the final answer as 0.0072 m rather than \(7.2 \times 10^{-3}\) m, depending on question requirements.

Break down complex topics into smaller, manageable chunks for easier recall.

Zambia

• ivwananji siwale – 29 pts

• Mid-point of A Line
• Equation of a Straight Line
• Parallel and Perpendicular Lines
• Area of Rectilinear Figures
• Distance of A Straight Line