# Adding one to numbers bigger than ten

Tell me the next number (add one) after the number
one million two hundred thirty-one thousand ninety-nine,

do you known if it is a common error that the first number that comes to mind, their answer, is "one million two hundred thirty-two thousand"?

In general, do you know any document or reference for usual errors when counting numbers? All references I've found are not applicable to numbers greater than ten.

• When I was young, a common trick was to ask "What is 1000, plus 1000, plus 20, plus 20, plus 20, plus 20, plus 10, plus 10?" with some answering "3000."
– JRN
Commented Feb 6, 2018 at 2:23
• Is that called “miscarrying a 1?” Commented Feb 6, 2018 at 4:05
• I saw a version of that trick with a prepared prop: the numbers were printed on a card, and were uncovered one at a time by the person trying to trick you. You were asked to keep a running total. It went 10, 1000, 20, 1000, 30, 1000, 40, and almost everybody says 4000 at the end
– user5114
Commented Feb 6, 2018 at 14:33
• 231,100 one million two hundred thirty-one thousand one hundred Commented Feb 8, 2018 at 1:58