Answer for exercise 1

a)

1. 150
2. 520
3. 1,830
4. 2,800
5. 30,640
6. 475,000
7. 1,700,000
8. 8,250,000

b)

1. million
2. twenty-two; and
3. forty-three thousand
4. eight hundred
5. eighteen million; ninety-one
6. four hundred and nineteen thousand
7. twenty-four
8. thirteen; nine hundred and fifty-four thousand

c)

1. a hundred and twenty-five
2. eight hundred and ninety-five
3. four thousand five hundred
4. twelve thousand four hundred and seventy
5. thirty-three thousand nine hundred and thirty
6. five hundred and seventy-five thousand six hundred
7. six million two hundred and fifty thousand
8. thirty-four million eight hundred and sixty thousand