1. fifty + thirty = eighty
2. one hundred + two hundred= three hundred
3. five hundred + four hundred = nine hundred
4. Four hundred + four hundred = eight hundred
5. One hundred + nine hundred = one thousand
6. Оne hundred and ninety - forty-five = one hundred and forty five
7.three hundred seventy - one hundred thirty five =
one hundred thirty five
8. eight hundred seventy-five - one hundred sixty-five =
seven hundred and ten
10. nine hundred and ninety-nine - three hundred seventy-three = six hundred twenty-six
11. eight hundred thirty-five - two hundred and five = five hundred and fifty
12. seven hundred seventeen + five hundred seventy-one = one thousand two hundred eighty-eight