College Algebra / Unit 1 Alg 014 short lesson, about 20 seconds
The Commutative Properties
Captions available
The idea
The commutative properties say order does not change sums or products: a + b = b + a; ab = ba.
In practice
3 + 7 and 7 + 3 land on 10; 4 · 6 and 6 · 4 land on 24.
Where people slip
Subtraction and division do neither: 8 − 3 ≠ 3 − 8.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
- Nothing. This is a starting point.
Unlocks
- Nothing yet depends on this.
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