8 times 8 is 64 — with the shortcut, the division facts and a drill to make it stick
8 × 8 = 64. It is a square, a cube and the number of squares on a chessboard all at once.
8 × 8 = 64. Said out loud in the way most classrooms say it: Eight eights are sixty-four.
8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = 64 — that is eight eights added together.
The classic rhyme is "I ate and I ate till I was sick on the floor — eight times eight is sixty-four". Silly, and it works.
A chessboard is 8 squares by 8, so it has 64 squares. 64 is also 4 × 4 × 4, which makes it one of the rare numbers that is both a square (8²) and a cube (4³), and it is 2 multiplied by itself six times — why 64 shows up in computing.
The neighbours follow from the square: 7 × 9 = 63 is one less than 64, and 8 × 9 = 72 is one more eight on top.
Method 1, split 8 into 5 + 3: 8 × 5 = 40 (half of 8 × 10 = 80) and 8 × 3 = 24. Add them: 40 + 24 = 64.
Method 2, the near-square trick (8 is 2 from 10): Go 2 down and 2 up: 6 × 10 = 60. Then add 2 squared: 60 + 4 = 64.
Double three times. 8 → 16 → 32 → 64.
8 × 8 is a square number: 64 is what you get when 8 is multiplied by itself, which is why the square root of 64 is 8.
Because one of the factors is even, the answer has to be even. 64 is, so the parity check passes.
8 × 8 = 64 and 64 ÷ 8 = 8 are one fact read in different directions. The facts either side — 8 × 7 = 56, 8 × 9 = 72, 7 × 8 = 56, 9 × 8 = 72 — are the answers people most often give by mistake when rushing, and each is just one eight away from 64.
8 × 8 sits in two lists at once: row 8 of the eight times table, and the eighth square number. The highlighted row is 64.
| × | 8 times table | Square numbers |
|---|---|---|
| 1 | 8 × 1 = 8 | 1 × 1 = 1 |
| 2 | 8 × 2 = 16 | 2 × 2 = 4 |
| 3 | 8 × 3 = 24 | 3 × 3 = 9 |
| 4 | 8 × 4 = 32 | 4 × 4 = 16 |
| 5 | 8 × 5 = 40 | 5 × 5 = 25 |
| 6 | 8 × 6 = 48 | 6 × 6 = 36 |
| 7 | 8 × 7 = 56 | 7 × 7 = 49 |
| 8 | 8 × 8 = 64 | 8 × 8 = 64 |
| 9 | 8 × 9 = 72 | 9 × 9 = 81 |
| 10 | 8 × 10 = 80 | 10 × 10 = 100 |
| 11 | 8 × 11 = 88 | 11 × 11 = 121 |
| 12 | 8 × 12 = 96 | 12 × 12 = 144 |
These are the facts one step away from 8 × 8 in the grid, and the answers people give by mistake when rushing. The last column shows how far each lands from 64; tap a fact to open it or its times table.
| Fact | Answer | Compared with 64 |
|---|---|---|
| 8 × 7 | 56 | 8 less |
| 8 × 9 | 72 | 8 more |
| 7 × 8 | 56 | 8 less |
| 9 × 8 | 72 | 8 more |
| 7 × 9 | 63 | 1 less |
| 9 × 7 | 63 | 1 less |
Use the drill on this page for a 60-second quiz on 8 × 8 and its neighbours, read the 8 times table in full, or play the arcade game until the answer comes without counting.
8 times 8 is 64. In words, eight eights are sixty-four.
64 ÷ 8 = 8, because 8 × 8 = 64.
Method 1, split 8 into 5 + 3: 8 × 5 = 40 (half of 8 × 10 = 80) and 8 × 3 = 24. Add them: 40 + 24 = 64. Method 2, the near-square trick (8 is 2 from 10): Go 2 down and 2 up: 6 × 10 = 60. Then add 2 squared: 60 + 4 = 64.
64 small squares, because the board is 8 × 8. Counting every square of every size, from 1 × 1 up to 8 × 8, gives 204 (1 + 4 + 9 + … + 64).
√64 = 8, because 8 × 8 = 64. 64 is also 4 × 4 × 4, so it is a perfect cube as well as a perfect square.
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.