50 Math Symbols You Need to Know (with Examples)

50 common math symbols, from + and − to ∫, ∇ and ≡, explained through visual animation. Each symbol includes its proper name, what it means in mathematics, and a quick visual example showing how it works in action. How many of these symbols did you already know? Let me know in the comments! 👇 Each symbol gets about 10 seconds of screen time: the symbol, its name, and an animated example (dots that add up, a number line, a balance, Venn diagrams, a rolling wheel for π, a tangent line for d/dx, and more). 🔔 Subscribe for more visual math animations: [Điền link kênh của bạn vào đây] 📺 Watch next - [Điền link một video khác của bạn vào đây] ⏱️ Chapters: 0:00 #1 + plus sign 0:18 #2 − minus sign 0:28 #3 × multiplication sign 0:38 #4 ÷ division sign 0:48 #5 = equals sign 0:58 #6 ≠ not equal to 1:08 #7 less than 1:18 #8 greater than 1:28 #9 ≤ less than or equal to 1:38 #10 ≥ greater than or equal to 1:48 #11 ≈ approximately equal to 1:58 #12 ± plus or minus 2:08 #13 % percent 2:18 #14 √ square root 2:28 #15 xⁿ power (exponent) 2:38 #16 π pi 2:48 #17 ∞ infinity 2:58 #18 ° degree 3:08 #19 ∠ angle 3:18 #20 ⊥ perpendicular 3:28 #21 ∥ parallel 3:38 #22 △ triangle 3:48 #23 |x| absolute value 3:58 #24 ! factorial 4:08 #25 Σ summation (sigma) 4:18 #26 Π product (pi) 4:28 #27 ∈ element of 4:38 #28 ∉ not an element of 4:48 #29 ⊂ subset 4:58 #30 ∪ union 5:08 #31 ∩ intersection 5:18 #32 ∅ empty set 5:28 #33 ∀ for all 5:38 #34 ∃ there exists 5:48 #35 ⇒ implies 5:58 #36 ⇔ if and only if 6:08 #37 ∴ therefore 6:18 #38 ∵ because 6:28 #39 ∝ proportional to 6:38 #40 Δ delta (change) 6:48 #41 ∫ integral 6:58 #42 d/dx derivative 7:08 #43 ∂ partial derivative 7:18 #44 lim limit 7:28 #45 ∇ nabla (gradient) 7:38 #46 log logarithm 7:48 #47 e Euler's number 7:58 #48 i imaginary unit 8:08 #49 φ golden ratio (phi) 8:18 #50 ≡ congruent (modulo) 8:28 End #Math #MathSymbols #Animation #Mathematics #VisualMath