How Do You Know?

A lesson on Predicting Place

Values

Think about this… 1. If you want to make the value of a digit

greater, where would you write it in a new number? 

2. How many times greater is the value of a digit, if it is moved to the left of its original position in a new number? 

3. How many times smaller is the value of a digit if it is moved to the right of its original position in a new number? 

4. If you want to make the value of a digit smaller, where would you write it in a new number?

Stephen needed $100 to check his luggage onto the airplane. He had 10

ten dollar bills.

Is It Enough?

Yes

How Do You Know?

100 is to the left of 10. You have to multiply 10x 10.

Stephen’s trip was originally 70 days long. He’s decided

to decrease his trip to 1/10 the amount of time. How

many days long is Stephens trip now? How do you know?

7 days

How Do You Know?

The amount of days of his trip is decreasing so you

move to the right. You should divide 70 by 10.

Stephen has been saving dimes in a jar for his trip. He

counts 24,567 dimes. What is the value of the 5 in this

number? What happens to the value of the 5 if it is

shifted 2 places to the left?

500

How Do You Know?

The 5 is the third digit in the place value chart. The third digit in the place value chart is the hundreds place, therefore the 5 is equivalent to 500. The value of the 500 increases to 50,000 because I multiplied