Grade 5 Unit 4
Lesson 4: Standard Algorithm: One-digit and Multi-digit
CC BY 2021 Illustrative Mathematics®
Grade 5 Unit 4
Lesson 4: Standard Algorithm: One-digit and Multi-digit
CC BY 2021 Illustrative Mathematics®
Find the value of each product mentally.
Here is how Han calculated 318 x 3 using partial products.
Here is how Elena calculated 318 x 3 using the standard algorithm.
What does the 2 in Elena’s calculation represent? Explain or show your reasoning.
What does the 5 in Elena’s solution represent? Explain or show your reasoning.
Calculate each product using Elena’s strategy.
Use the standard algorithm to find the value of 3,514 x 7.