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Gemma Snell

Written Addition Reasoning

Grades: 3rd Grade, 4th Grade
Subjects: Math

Student Instructions

Click add Page 1 will ask you to rank 4 hto+hto calculations in order of difficulty. Think carefully about what would happen if you were to calculate these using the written method as this may help you decide! Try to avoid the temptation to work the answers out as you decide. Page 2 asks you to create your own hto+hto calculations, thinking about renaming. Click mic as you work to record your ideas. Click check to send your work to me!

Teacher Notes (not visible to students)

This activity sits at the end of a unit of work on the formal written algorithm for addition. The children will be asked to focus on the use of renaming and how many times they do this- needing a deep understanding of the process and how the value of the digits will lead to a need to rename or not.

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