shí
10
English groups digits in threes, Chinese in fours. That is where 万 and 亿 come from — and why millions take some getting used to.
English splits a number into threes: thousand, million, billion. Chinese splits it into fours: 万 (10,000) and 亿 (100,000,000). So a million is "a hundred ten-thousands", 一百万, and a billion is "ten hundred-millions", 十亿.
Grammar rule: Big numbers with 万 and 亿
liǎng wàn wǔ qiān
25,000
shí wǔ wàn
150,000
yì bǎi wàn
1,000,000
sān bǎi wǔ shí wàn
3,500,000
yí yì
100,000,000
shí sì yì
1,400,000,000
A million is 一百万 (yì bǎi wàn): a hundred times 万 (10,000).
A billion is 十亿 (shí yì): ten times 亿 (100,000,000).
万 (wàn) is 10,000. In Chinese it is a place value of its own, the way a thousand is in English: 三万 is 30,000, 十万 is 100,000.
Tomyo
Numbers stick when you use them. Tomyo reviews your words on a schedule so what you learn is still there a month later.