7th Grade · The Number System
Divisor
7.NS.A.2b
Definition
The number by which the dividend is divided. In a ÷ b = c, the divisor is b. The divisor can never be zero (undefined).
Teach it
Where it is taught, with guided notes, practice, homework, an exit ticket and an interactive Teacher Deck.
Examples
- In −18 ÷ 3 = −6, the divisor is 3.
- Dividing by 0 is undefined — you cannot divide by 0.
Key rule
The divisor can never be zero.
Memory hook
Divisor = the number you divide by.