1. Multiply by Multiples of 10 and 100

2. Multiplying by 10

3. Multiplying by 100

4. Multiplying by Multiples of 10

5. Multiplying by Multiples of 100

6. Use Base 10 blocks to solve the problem
A Bombardier Challenger airplane holds 22 passengers.
About how many passengers will 4 of these planes hold?
Estimate to solve this problem.

7. Story Problem Solution
A Bombardier Challenger airplane holds 22 passengers. About how many passengers will 4 of these planes hold? Estimate to solve this problem.
22 is close to 20
4 X 2 = 8 so
4 X 20 = 80

8. Use Base 10 blocks to solve the problem
Stephen wants to buy 4 DVD’s.
A DVD costs $28.
About how much would 4 DVD’s cost?

9. Story Problem Solution
Stephen wants to buy 4 DVD’s.
A DVD costs $28.
About how much would 4 DVD’s cost?
4 X 3 = 12
4 X 30 = 120

10. Use Base 10 blocks to solve the problem
There are 157 pages in each book.
Sharon read 3 books.
About how many pages did Sharon read?

11. Story Problem Solution
There are 157 pages in each book.
Sharon read 3 books.
About how many pages did Sharon read?
157 is close to 200
3 X 2 = 6
3 X 200 = 600