17 times 17 is 289 — with the shortcut, the division facts and a drill to make it stick
17 × 17 = 289. That is the short answer, and it is the same answer whichever way round you write the two numbers. Below is where 289 comes from, the shortcut that gets you there without counting, the division facts that travel with it, and the fastest way to move it from "I can work it out" to "I just know it".
17 × 17 = 289. Said out loud in the way most classrooms say it: Seventeen seventeens are two hundred and eighty-nine.
Multiplying is repeated addition, so 17 × 17 is seventeen seventeens added together, or equally seventeen seventeens added together. Both routes land on 289.
Written the other way round the answer does not change. 17 × 17 = 289 as well, because multiplication is commutative — the order of the two factors never affects the product. That halves how many facts you actually have to learn: get 17 × 17 and you have 17 × 17 for free.
Split the seventeen into 10 + 7. Ten seventeens are 170, seven seventeens are 119, and 170 + 119 = 289.
17 × 17 is a square number: 289 is what you get when 17 is multiplied by itself, which is why the square root of 289 is 17.
Both factors are odd, so the answer has to be odd as well. 289 is odd, which rules out a whole class of slips.
Every multiplication fact comes with a division fact on its back. These four all say the same thing about 17, 17 and 289: 17 × 17 = 289; 17 × 17 = 289; 289 ÷ 17 = 17; 289 ÷ 17 = 17.
Learning them as one family rather than four separate things is the single biggest shortcut in times-table practice. If you can answer "289 divided by 17" as fast as you can answer "17 times 17", the fact is genuinely learned rather than just recognised.
In the 17 times table, 289 is the seventeenth step: 17, 34, 51, 68, 85, 102, 119, 136, 153, 170, 187, 204, 221, 238, 255, 272, 289.
In the 17 times table it is the seventeenth step instead: 17, 34, 51, 68, 85, 102, 119, 136, 153, 170, 187, 204, 221, 238, 255, 272, 289.
Seeing the same number arrive from two directions is what makes it stick. 289 is a landmark in both rows, so whichever table you are drilling you meet it again.
17 × 16 = 272, 17 × 18 = 306, 16 × 17 = 272, 18 × 17 = 306. Those are the answers people most often give by accident when they are a beat too quick.
The gap between neighbours is worth knowing on its own: each extra seventeen adds 17 to the running total, and each extra seventeen adds 17. So if 17 × 17 = 289 is solid, you can reach 17 × 18 by adding 17 rather than starting again.
Recognising a fact and recalling it under time pressure are different skills. A fact you can work out in four seconds still costs you four seconds every time it appears inside a longer calculation.
Short daily bursts beat long sessions: a 60-second drill every day will fix a table faster than one twenty-minute sitting a week. Mix the fact you are learning in among ones you already know so recall is being tested, not the order of a list.
17 times 17 is 289. In words, seventeen seventeens are two hundred and eighty-nine.
17 times 17 is also 289. Swapping the two factors never changes the answer, so 17 × 17 and 17 × 17 both come to 289.
289 ÷ 17 = 17, because 17 × 17 = 289. The matching fact is 289 ÷ 17 = 17.
Split the seventeen into 10 + 7. Ten seventeens are 170, seven seventeens are 119, and 170 + 119 = 289.
Yes. 289 is the seventeenth number in the 17 times table, and the seventeenth number in the 17 times table.
Every multiplication fact from 2 × 2 to 20 × 20 has its own page here, and the full grid is on the multiplication chart.