Understanding Standard Form and Place Value

What is the standard form of the number twelve?

• 12

• 120

• 21

• 1.2

In the number 945, what digit is in the tens place?

• 0

• 4

• 9

• 5

Convert the expanded form 4 x 1000 + 9 x 100 + 5 x 10 + 2 x 1 to standard form.

• 4592

• 4952

• 4259

• 4925

What is the standard form of the number represented by 7 x 1000 + 8 x 100 + 6 x 1?

• 7860

• 7680

• 7068

• 7806

If a digit is missing in the tens place, what should you fill it with?

• 9

• 0

• 1

• 5