100 x 12 = 1200
100 times 12 is 1200. The quickest route is to split the 12: ten hundreds is 1000, two hundreds is 200, and 1000 plus 200 is 1200. A calculator sits below.
100 × 12 = 1,200
Adding 100 to itself 12 times gives the same answer.
Split the 12
Twelve is ten plus two, and both of those are easy against 100.
- 100 x 10 = 1000
- 100 x 2 = 200
- 1000 + 200 = 1200
Keep that split. It works for anything times 12, not just for 100, and it is faster than reaching for the twelve times table.
Twelve of something is usually a year
Most people looking up a times-12 answer are counting months. 100 a month across twelve months is 1200 a year, and the total is the same 1200 whether the 100 is a subscription, a repayment or an amount put aside.
Two other readings of the same number: 1200 is a dozen hundreds, and 1200 minutes is exactly 20 hours, since 20 x 60 = 1200.
Keep the decimal point still
100 x 12 = 1200, but 100 x 1.2 = 120 and 100 x 120 = 12000. Same digits three times over. The zeros carry the whole meaning, so check them before you check the multiplication.