Assessment

Fractured Subtraction

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This Fractured Subtraction assessment also includes:

Can you spare a 10? Scholars determine digits that could complete a two-digit subtraction problem. They must find all possible combinations of digits and provide an explanation for their reasoning.

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Additional Tags
Instructional Ideas
  • Challenge learners to develop their own fractured subtraction problems
Classroom Considerations
  • Pupils should be comfortable with two-digit subtraction using the standard algorithm
  • While the task is designed for middle school, you could easily use it at the elementary level
Pros
  • Answer key lists all possible outcomes
  • Simple task requiring higher-level thinking skills
Cons
  • Rubric indicates one or two points for the partial level, but it does not explain how to award points