11 times 18 is 198 — with the shortcut, the division facts and a drill to make it stick
11 × 18 = 198. It is outside the usual school grid, but the elevens pattern gets you there faster than a calculator.
11 × 18 = 198. Said out loud in the way most classrooms say it: Eleven eighteens are one hundred and ninety-eight.
Multiplying is repeated addition, so 11 × 18 is eleven eighteens added together, or equally eighteen elevens added together. Both routes land on 198.
The elevens shortcut: write the digits of 18 apart, 1 _ 8, and put their sum in the middle. 1 + 8 = 9, so 11 × 18 = 198.
Or go through a round number. 18 × 11 = 18 × 10 + 18 = 180 + 18 = 198. A third check: 11 × 18 is just under 11 × 20 = 220, and two elevens less is 220 − 22 = 198.
Having more than one route matters for a fact outside the usual 12 × 12 grid — nobody memorises 11 × 18, but anyone can reconstruct it in two seconds.
Method 1, split 18 into 10 + 8: 11 × 10 = 110 and 11 × 8 = 88. Add them: 110 + 88 = 198.
Method 2, halve 18, double 11: Halving one factor and doubling the other keeps the answer the same: 11 × 18 = 9 × 22 = 198.
Split the eleven into 10 + 1. Ten eighteens are 180, one more eighteen makes 198.
Because one of the factors is even, the answer has to be even. 198 is, so the parity check passes.
198 is a multiple of nine — its digits add to 18, which is itself a multiple of nine.
11 × 18 = 198, 18 × 11 = 198, 198 ÷ 11 = 18 and 198 ÷ 18 = 11 are one fact read in different directions. The facts either side — 11 × 17 = 187, 11 × 19 = 209, 10 × 18 = 180, 12 × 18 = 216 — are the answers people most often give by mistake when rushing, and each is just one eleven or one eighteen away from 198.
198 appears twice in the grid: as 11 × 18 in the eleven times table and as 18 × 11 in the eighteen times table. The highlighted row shows both.
| × | 11 times table | 18 times table |
|---|---|---|
| 1 | 11 × 1 = 11 | 18 × 1 = 18 |
| 2 | 11 × 2 = 22 | 18 × 2 = 36 |
| 3 | 11 × 3 = 33 | 18 × 3 = 54 |
| 4 | 11 × 4 = 44 | 18 × 4 = 72 |
| 5 | 11 × 5 = 55 | 18 × 5 = 90 |
| 6 | 11 × 6 = 66 | 18 × 6 = 108 |
| 7 | 11 × 7 = 77 | 18 × 7 = 126 |
| 8 | 11 × 8 = 88 | 18 × 8 = 144 |
| 9 | 11 × 9 = 99 | 18 × 9 = 162 |
| 10 | 11 × 10 = 110 | 18 × 10 = 180 |
| 11 | 11 × 11 = 121 | 18 × 11 = 198 |
| 12 | 11 × 12 = 132 | 18 × 12 = 216 |
| 13 | 11 × 13 = 143 | 18 × 13 = 234 |
| 14 | 11 × 14 = 154 | 18 × 14 = 252 |
| 15 | 11 × 15 = 165 | 18 × 15 = 270 |
| 16 | 11 × 16 = 176 | 18 × 16 = 288 |
| 17 | 11 × 17 = 187 | 18 × 17 = 306 |
| 18 | 11 × 18 = 198 | 18 × 18 = 324 |
These are the facts one step away from 11 × 18 in the grid, and the answers people give by mistake when rushing. The last column shows how far each lands from 198; tap a fact to open it or its times table.
| Fact | Answer | Compared with 198 |
|---|---|---|
| 11 × 17 | 187 | 11 less |
| 11 × 19 | 209 | 11 more |
| 10 × 18 | 180 | 18 less |
| 12 × 18 | 216 | 18 more |
| 10 × 19 | 190 | 8 less |
| 12 × 17 | 204 | 6 more |
| 18 × 11 | 198 | same answer |
Use the drill on this page for a 60-second quiz on 11 × 18 and its neighbours, read the 11 and 18 times tables in full, or play the arcade game until the answer comes without counting.
11 times 18 is 198. In words, eleven eighteens are one hundred and ninety-eight.
198 ÷ 11 = 18, because 11 × 18 = 198. The matching fact is 198 ÷ 18 = 11.
Method 1, split 18 into 10 + 8: 11 × 10 = 110 and 11 × 8 = 88. Add them: 110 + 88 = 198. Method 2, halve 18, double 11: Halving one factor and doubling the other keeps the answer the same: 11 × 18 = 9 × 22 = 198.
Yes. Multiplication can be done in either order, so 11 × 18 and 18 × 11 both equal 198.
Split the digits of 18 and put their sum between them: 1, then 1 + 8 = 9, then 8 gives 198. Or work out 10 × 18 = 180 and add one more 18.
198 ÷ 11 = 18 and 198 ÷ 18 = 11.
Every times table from 1 to 20 is written out on the times tables page, with a drill for any row, and the full grid is on the multiplication chart.