Dividing by 3
Every division fact for 3, how to spot a number that divides by it, and practice that stays on this one divisor.
Practise dividing by 3 →10 minutes free · no account needed
The facts
3 ÷ 31
6 ÷ 32
9 ÷ 33
12 ÷ 34
15 ÷ 35
18 ÷ 36
21 ÷ 37
24 ÷ 38
27 ÷ 39
30 ÷ 310
33 ÷ 311
36 ÷ 312
Does it divide by 3?
Add the digits. If that total divides by 3, so does the number.
72 → 7 + 2 = 9, and 9 divides by 3. So 72 ÷ 3 = 24.
Questions
▸How do you know if a number divides by 3?
Add the digits. If that total divides by 3, so does the number. 72 → 7 + 2 = 9, and 9 divides by 3. So 72 ÷ 3 = 24.
▸What is 21 ÷ 3?
21 ÷ 3 = 7.
▸What is 27 ÷ 3?
27 ÷ 3 = 9.