Hi guys! Sorry it has been such a long time since my last post. Here’s an update about me: I’ve been extremely busy with school while trying to apply to college at the same time. I’ve recently got really sick but I’m feeling better now so I made a quick post about the numeral system in Vietnamese. 

Numbers: Số

Zero: Không

One: Một

Two: Hai

Three: Ba 

Four: Bốn

Five: Năm 

Six: Sáu

Seven: Bảy 

Eight: Tám

Nine: Chín

Ten: Mười

Tens (20, 30, 40,…): Number + mươi (20 = Hai mươi)

Hundreds (100, 500, 800,…): Number + trăm (500 = năm trăm)

Thousands (1000, 6000,…): Number + ngàn/nghìn (7000 = bảy ngàn/nghìn)

Millions (7000000, 2000000,…): Number + triệu (1000000 = một triệu)

Billions (3000000000, 5000000000,…): Number + tỷ (3000000000 = ba tỷ)

Hundreds/Thousands + one-digit numbers (1004, 208, 403, 5006,…): Number + trăm/ngàn/nghìn + lẻ/linh + number (one-digit number) (801 = tám trăm lẻ/linh một, 3007 = ba ngàn/ngìn lẻ/linh bảy)

Tens/hundreds/thousands + one (21, 401, 9001,…): Number + mươi + mốt (61 = sáu mươi mốt)

Hundreds/Thousands/Millions/Billions and a half (150, 7500,…): Number + trăm/ngàn or nghìn/triệu/tỷ + rưỡi (350 = ba trăm rưỡi)

Counting: Đếm

Counting by Dozens: Number + tá (24 = hai tá)

Counting by Tens: Number + chục (80 = tám chục)

 - NOTES: 

The Tens/hundreds/thousands + one rule doesn't apply to 11, 11 is simply pronounced as mười một (10 + 1) instead of mười mốt. 

The Hundreds/Thousands/Millions/Billions and a half rule is not necessary, it is just a faster/shorter version that people use when speaking. 

When pronouncing tens + a number (41, 23, 94, 67,..), people sometimes would shorten it and only pronounce the first and the second number without saying 'mươi' in between (38 = ba mươi tám or ba tám, 71 = bảy mươi mốt or bảy mốt)