# Thread: Use of "and" in writing numbers in words

1. ## Use of "and" in writing numbers in words

Hi all,

I believe that you are aware that many Mathematics syllabi require all of our primary school children to learn (usually in the first chapter in their textbooks) the writing of numbers in words. From single digit numbers (in primary 1 or younger) to 10 million (in Primary 5).

What I wish to ask is the grammatical rule in the use of "and" in this context? For example, we do not (I learnt it by exposure without knowing the rule!) write "123" as "one hundred twenty-three" but "one hundred and twenty-three". Yet, in the number "2123", there isn't an "and" between "two thousand" and "one hundred", as in we don't usually write "two thousand and one hundred and twenty-three", or perhaps there is a difference between the spoken and written form in formal English?

This inconsistencies somehow extend up to 1 million, as in:-

32 123 : there isn't and between "thirty-two thousand" and "one hundred" (or should there be one?)
432 123 : there is an "and" between "four hundred" and "thirty-two thousand". In this case, will the repeated use of the word "and" in the statement sounds too mouthful?
1 432 123: Again, there isn't an "and" between "one million" and "four hundred thousand".

So how do I tell my kids when to use and when not to use it? What is the formal grammatical rule on this?

Kindly please enlightened me. Thank you.

Aaron

2. ## Re: Use of "and" in writing numbers in words

Put and after hundred or thousand when they're alone and after hundred when they're together:
101 one hundred and one
1001 one thousand and one
1101 one thousand, one hundred and one

3. ## Re: Use of "and" in writing numbers in words

Put and after hundred or thousand when they're alone and after hundred when they're together:
101 one hundred and one
1001 one thousand and one
1101 one thousand, one hundred and one

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