Answers:
a) two million five hundred and forty-three thousand
b) five million fifty thousand
c) eight million one hundred and forty-seven thousand six hundred
d) two million one hundred and fifty thousand
e) seven million two hundred and thirty thousand and fourteen
f) five million one hundred and ninety-two thousand six hundred and twenty-two
g) nine million nine thousand and nine
Key idea: split each number into groups of three digits:
\[ \text{millions}\mid\text{thousands}\mid\text{ones} \]
For example:
\[ 7\ 230\ 014=7\text{ million}+230\text{ thousand}+14 \]
So we write: seven million two hundred and thirty thousand and fourteen. Groups containing only zeros are not read.
Check:
\[
9\ 009\ 009=9\text{ million}+9\text{ thousand}+9
\]
which gives nine million nine thousand and nine.
