5-6 Multiplication Doubling Strategy part 2

5-6 Multiplication Doubling Strategy part 2

Open Ended

What do all the doubles have in common?

Multiple Choice

Do you think doubles will always be even numbers?

• Yes

• No

Solve using paper and pencil or whiteboard.

Your friend is planning a rectangular garden that is 6 feet wide and 7 feet long. To buy the correct amount of fertilizer she needs to find the area of the garden, but shes does not know how to solve

 $6\times7$  How could she use doubling to figure out the area?

Try this:

Your friend changed her mind. Now she wants her garden to be 4 feet wide and 8 feet long. She needs to find the area of this garden, but she does not know how to solve

 $4\times8$  
Use doubling to help her solve .

Open Ended

How could you break apart the 4-by-8 garden?

Lets try one more!

You are planning a 8-by-9 foot garden. What is the area of this garden? Use your whiteboard, or paper/grid paper to figure out the area.

Multiple Choice

Which side could you find half to find half the area?

• 8

• 9