Place Value and Expanded Form

Professor Perez introduces digits and place value, explaining how digits are symbols used to form numbers. He discusses the concept of place value, showing how the position of a digit determines its value. The video covers the periods in numbers, such as ones, thousands, and millions, and how to read large numbers correctly. It also explains writing numbers in expanded form to reinforce understanding of place value, which is useful for arithmetic calculations.

How many digits are there in the decimal system?

• Nine

• Ten

• Eleven

• Twelve

Which digit is often forgotten when counting the total number of digits?

• Zero

• Nine

• Eight

• One

What is the place value of the digit '5' in the number 456?

• Hundreds

• Thousands

• Ones

• Tens

What is the first period called in a number?

• Ones

• Billions

• Millions

• Thousands

In the number 34,436,781,525,372, which word is not used when reading it?

• Billion

• Million

• Trillion

• And

How many digits should each period have, except for the first one?

• Four

• Three

• Two

• One

What is the correct way to represent 'Three Billion' in digits?

• 3,000,000

• 3,000,000,000,000

• 3,000,000,000

• 3,000

Which period comes after the millions period?

• Trillions

• Billions

• Quadrillions

• Thousands

How many zeros are needed to represent the millions period if there are no millions?

• Two

• None

• One

• Three

What is the expanded form of the number 13?

• 30 + 1

• 13

• 1 + 3

• 10 + 3