Answer:
The correct spelling out of the numbers is:
1. 776-7799: siete, setenta y seis, setenta y siete, noventa y nueve.
2. 543-3162: cinco, cuarenta y tres, treinta y uno, sesenta y dos.
3. 483-4745: cuatro, ochenta y tres, cuarenta y siete, cuarenta y cinco.
Explanation:
The spelling out of number in Spanish applied for the exercise is actually simple, you must know the number since 0 to 100 and remembering that, regularly, the correct form to spell them is the first solo, and the other numbers in pairs, this is not an obligation, because sometimes the people prefer saying the numbers one on one for evading mistakes with numbers that sound similar (for example 60 that is "sesenta" and 70 that is "setenta"), but the form in the exercise is the regularly used in Spanish.