1000 x 2 = 2000
1000 x 2 = 2000. This is a doubling rather than a calculation: a thousand counted twice. It is the first step of the chain that runs 2,000, 4,000, 8,000.
1,000 × 2 = 2,000
Adding 1,000 to itself 2 times gives the same answer.
Why the answer is 2,000
Doubling is the one multiplication that needs no method. A thousand and another thousand is two thousand. Halving reverses it: 2,000 / 2 = 1,000.
The chain above it
- 1,000 x 2 = 2,000
- 1,000 x 3 = 3,000
- 1,000 x 4 = 4,000, which is 2,000 doubled again
Keep doubling and the next rung is 8,000. Each step only touches the leading digits, because the three zeros of 1,000 stay put throughout.
The same answer from another pair
20 x 100 = 2,000 as well. One factor gained a zero while the other lost one, so the total did not move.
2,000 as a measurement
Because the metric prefixes step by a thousand, 2,000 metres is 2 kilometres, 2,000 grams is 2 kilograms and 2,000 milligrams is 2 grams. Ten times further along sits 1,000 x 10 = 10,000.