How to Sum Different Numbers Easily

Introduction to Understanding Numbers

Why is there a U in Four but not Forty?

Add Three Numbers to Make 30: A Fun Brainteaser

Discovering the number 20

Integration vs Summation. Continuous vs Discrete. Same sine curve — different mathematics. What’s the difference between: ∫ sin(x) dx and Σ sin(x) They may look similar, but they are fundamentally different. 1️⃣ Integration of sin(x) ∫ sin(x) dx = −cos(x) C Integration gives the continuous accumulated area under the sine curve. Graphically: You are measuring smooth area under a smooth wave. 2️⃣ Summation of sin(x) Σ sin(xₖ) Summation adds discrete sampled values of the sine function. Graphically