Unit 3 - Lesson 5 - Grade 3: Illustrative Mathematics
By Formative Library
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10 questions
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Grade 3 Unit 3
Lesson 5: Another Addition Algorithm
CC BY 2021 Illustrative Mathematics®
Grade 3 Unit 3
Lesson 5: Another Addition Algorithm
CC BY 2021 Illustrative Mathematics®
Lesson: Another Addition Algorithm
What do you notice?
What do you notice?
What do you wonder?
What do you wonder?
Here are two algorithms for adding 367 + 231.
Han’s algorithm
Elena’s algorithm
Discuss with your partner:
How is Elena’s algorithm different from Han’s algorithm?
Discuss with your partner:
How is Elena’s algorithm different from Han’s algorithm?
Discuss with your partner:
Why do both algorithms work?
Discuss with your partner:
Why do both algorithms work?
Here are two algorithms for adding 365 + 182.
Han’s algorithm
Elena's algorithm
How do the algorithms show the 14 tens differently?
How do the algorithms show the 14 tens differently?
Try Elena’s algorithm to find the value of the sum.
174 + 352
Try Elena’s algorithm to find the value of the sum.
174 + 352
Try Elena’s algorithm to find the value of the sum.
273 + 619
Try Elena’s algorithm to find the value of the sum.
273 + 619
Try Elena’s algorithm to find the value of the sum.
354 + 198
Try Elena’s algorithm to find the value of the sum.
354 + 198
Try Elena’s algorithm to find the value of the sum.
525 + 376
Try Elena’s algorithm to find the value of the sum.
525 + 376
Cool Down: Use an Algorithm for Addition
Use an algorithm of your choice to find the value of 365 + 182.
Use an algorithm of your choice to find the value of 365 + 182.