Final answer:
To multiply 5 by 900 using the breakdown strategy, break down 900 into 500 and 400. Multiply each part by 5 and add the results to get the final answer, which is 4500.
Step-by-step explanation:
To multiply 5 by 900 using the breakdown strategy, you can break down 900 into smaller parts and then multiply each part by 5. Let's break down 900 into 500 and 400.
5 x 500 = 2500
5 x 400 = 2000
Add the results to get the final answer:
2500 + 2000 = 4500