Wonder how many pieces of candy a teacher can eat. Pupils watch a video of candy in a bowl as some candy is removed to be eaten and others are added. Learners devise questions about the situation along with estimated solutions. Scholars check their estimates when presented with the actual numbers of pieces of candy.

Concepts

estimation, estimating differences, estimating sums, 2-digit addition, addition, 2-digit subtraction, subtraction

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Instructional Ideas

• Ask class members to come up with a problem that involves addition and subtraction of two-digit numbers
• Conduct the task together as a class as opposed to individually

Classroom Considerations

• Assumes the instructor is familiar with Three Act Tasks

Pros

• Provides a list of possible questions that can be answered
• Includes comments from the author on some key points about the task

Cons

• None

Common Core

2.NBT.B.6 2.NBT.B.7 2.NBT.B.9