Question

Expression - (2 tens 1 one) × 10 Unit form and standard form

Answer 1

A unit form is a way to show how many of each size unit are in  the number.

A standard form is a number written with one digit for  each place value.

In your case number is

(2 tens 1 one) × 10=21×10=210 - this is standard form.

210 is 2 hundreds 1 tens and 0 units - this is unit form.

Answer 2

2 tens and 1 one is 21

21 x 10 is 210

21 x 10 = 210

2 tens 1 one x 1 ten equals 2 hundreds one ten

:)