1. Seven SI Base Units — "My Kids Study A Kilo (of) Moles Carefully"

• My → Mass (kg)
• Kids → Kelvin (K)
• Study → Second (s)
• A → Ampere (A)
• Kilo → Length (metre — kilo-metre reference)
• Moles → Mole (mol)
• Carefully → Candela (cd)

2. Error Propagation — "AAM-RPM"

• Absolute errors add for Addition/subtraction (AAM)
• Relative errors add for Products/division (RPM)
• Power Multiplies relative error (M)

3. Significant Figures — "Leading Zeros Lie, Trailing Truths Tell"

• Leading zeros are NEVER significant (they "lie" about precision)
• Trailing zeros AFTER a decimal ARE significant (they "tell" the truth)

4. Dimensional Formulas — "FEP Are MAPT"

• Force [M^{1}$$L^{1}$$T^{-2}]
• Energy [M^{1}$$L^{2}$$T^{-2}]
• Power [M^{1}$$L^{2}$$T^{-3}]
• Angular momentum [M^{1}$$L^{2}$$T^{-1}]
• Pressure [M^{1}$$L^{-1}$$T^{-2}]
• Torque [M^{1}$$L^{2}$$T^{-2}]

Notice: Force → Energy (add one L), Energy → Power (change $T^{-2}$ to $T^{-3}$), Energy → Angular momentum (change $T^{-2}$ to $T^{-1}$).

5. Percentage Error Shortcut — "PABC Rule" For Z = Aᵃ × Bᵇ / Cᶜ: % error in Z = a × (%A) + b × (%B) + c × (%C) "The Power Acts as a Multiplier Before Combining"