The Identity Properties
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
The identity property of addition says a + 0 = a; the identity property of multiplication says a · 1 = a — zero and one leave numbers unchanged.
Show
57 + 0 stays 57; 57 · 1 stays 57. Zero is the additive identity, one the multiplicative.
Builds on
- Nothing — this is a starting point.
Unlocks
- Nothing yet depends on this.