Answer: Standard form: 210
Unit form: 2 hundreds and one tens.
Step-by-step explanation: We are asked to write in unit form and standard from.
First of all, we will expand our given numbers as: 2 tens: Therefore, our given number in standard form would be 210. To write our given number in unit form, we will write our given numbers according to their place values.
210:
Ones: 0
Tens: 1
Hundreds: 2
Therefore, our given number in unit form would be 2 hundreds and one tens.