Task Teacher Guide
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In This Purposeful Practice…
Students will explore comparison subtraction with decimal values and the impact of adding a negative integer.
Intentionality…
The purpose of the Day 4 activities is to reinforce key concepts from Days 1-3. Students will engage in a string of related problems through a math talk and will have an opportunity to complete independent purposeful practice. Today’s activities should be completed without the use of a calculator. The math talk and purposeful practice serve to develop a deeper understanding of the following big ideas.
- Fractions can be represented in a variety of ways;
- Fractions (and their decimal representation) represent values relative to a whole (for example, one whole dollar);
- Quantities represented as a decimal are fractions limited to base ten denominators (i.e.: tenths, hundredths, thousandths, etc.);
- Standard representation of coin values are expressed as decimal hundredths;
- Subtraction can mean difference and is used to compare two quantities;
- Removal subtraction of a positive value or adding the negative of that same value has the same result, i.e., 6 – 2 = 6 + (-2).
Math Talk
Related String of Problems
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Purposeful Practice
While Students Are Practicing…
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Questions: Subtracting Decimals and Adding Integers
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Resources and Downloads
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Lesson Tip Sheet
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Videos & Images
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Printable Handout
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Explore The Entire Unit of Study
This Make Math Moments Task was designed to spark curiosity for a multi-day unit of study with built in purposeful practice, and extensions to elicit and emerge mathematical models and strategies.
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How Much?
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1. Consider the…
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2. Luisa has…
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3. Joey wants…
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4. Consider the…
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5. Model and solve…
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