Addition Table for 18
Each row adds 18 to numbers 1 through 12. Addition tables help build number sense and make mental math faster.
Adding 18 keeps parity: even meets even, odd meets odd, all down the sum column. The nearest round ten is 20, just 2 away: 18 + 2 = 20. Every fact runs backward for free: from 18 + 6 = 24 comes the subtraction fact 24 − 18 = 6.
| Addend | Sum |
|---|---|
| 18 + 1 | 19 |
| 18 + 2 | 20 |
| 18 + 3 | 21 |
| 18 + 4 | 22 |
| 18 + 5 | 23 |
| 18 + 6 | 24 |
| 18 + 7 | 25 |
| 18 + 8 | 26 |
| 18 + 9 | 27 |
| 18 + 10 | 28 |
| 18 + 11 | 29 |
| 18 + 12 | 30 |
Frequently asked questions
What are the addition facts for 18?
Adding 18 to each number 1 through 12 gives every fact above, from 18 + 1 = 19 up to 18 + 12 = 30.
What is 18 + 7?
18 + 7 = 25.
What is the fastest way to add 18 mentally?
Split 18 into tens and ones, add the tens first, then the ones. For example 18 + 6 = (18 + 5) + 1 = 23 + 1 = 24.