Twelve [twelve LV] [twelve];

Thirteen thirteen [θ'ti? n；' θti？ n]；

144 [f'ti? n； fti？ n]；

155 [f? f'ti？ n； f？ fti？ n]；

Sixty, sixty? Kosti. n； s？ ksti？ n]；

Seventy-seven [sev (? )n'ti？ n； sev(？ )nti？ n]；

188[e？ ti？ n； 'e？ ti？ n]； ?

19 19【na？ Enti. n； na？ nti？ n]；

220? ]。

Extended data

Memory formula

Words that represent numbers are called cardinal words. Its form is as follows:

1, from1-10 one, two, three, four, five, six, seven, eight, nine, ten.

2. From 1 1—— 19 Eleven, twelve, thirteen, fourteen, fifteen, sixteen, seventeen, eighteen and nineteen.

3. From where? Twenty, thirty,? Forty, fifty and eighty are special forms, while six, seventy and ninety are single-digit forms, plus the suffix -ty. When representing dozens, add a hyphen "-"between dozens and the unit cardinal form? 2 1 21 76 76.

4. Add "one percent" to the form of hundred digits, which means hundred, and add and between tens and hundreds.

5. More than 1000 digits? Counting from the right end to the left end of the number, add a comma ","to every three digits. Starting from the right, after the number before the first ",",add the number before the second ","? Million, add one billion after the number before the third ",". Then, section by section, the maximum number between two commas is in hundreds.