Number Line: Operations

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Number Line: Operations لقطة الشاشة  تحميل  Embed
  • Operations
  • Number Line
  • Integers


  • Operations
  • Number Line
  • Integers


Explore operations with integers using an authentic context of net worth, then generalize with a number line. Experiment with adding and subtracting both positives and negatives, and make predictions about whether the total will be positive or negative.

أهداف التعلم

  • Represent addition and subtraction of integers on a horizontal number line
  • Reason about addition and subtraction of integers in terms of number-locations
  • Use logical necessity to reason that addition has the opposite effect as subtraction or that adding (or subtracting) a negative integer has the opposite effect as adding (or subtracting) a positive integer.
  • Recognize and generate equivalence classes of integer sums and differences
  • Show that a number and its additive inverse (opposite) have a sum of 0
  • Using a net worth context, describe situations that have a positive sum or difference, negative sum or difference, and zero sum or difference
  • View adding a negative as equivalent to subtracting a positive, and explain why this relationship makes sense in contexts such as net worth.
  • View subtracting a negative as equivalent to adding a positive, and explain why this relationship makes sense in contexts such as net worth.
  • Apply a number line model for addition and subtraction to new contexts.

Standards Alignment

Common Core - Math

Apply and extend previous understandings of addition and subtraction to add and subtract rational numbers; represent addition and subtraction on a horizontal or vertical number line diagram.
Describe situations in which opposite quantities combine to make 0. For example, a hydrogen atom has 0 charge because its two constituents are oppositely charged.
Understand p + q as the number located a distance |q| from p, in the positive or negative direction depending on whether q is positive or negative. Show that a number and its opposite have a sum of 0 (are additive inverses). Interpret sums of rational numbers by describing real-world contexts.
Understand subtraction of rational numbers as adding the additive inverse, p - q = p + (-q). Show that the distance between two rational numbers on the number line is the absolute value of their difference, and apply this principle in real-world contexts.
Apply properties of operations as strategies to add and subtract rational numbers.
Version 1.0.1

Teacher Tips

The دليل المعلم (pdf) يشتمل على نصائح للمعلمين تم وضعها بواسطة فريق موقع فيت. ( PDF ).

Teacher-Submitted Activities

Integer Addition and Subtraction Assessment Gillian Walker المرحلة المتوسطة
المرحلة الثانوية
واجب منزلي

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