Adding and Subtracting Positive and Negative Rational Numbers (Grade 7)
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In this lesson set, students extend their previous understanding of addition and subtraction of positive numbers to include negative numbers.
Through engaging in the tasks in this lesson set, students will:
- add opposite numbers and determine that their sum is always 0;
- make conjectures about sums and differences of positive and negative numbers based on observed patterns;
- develop an understanding of addition and subtraction as movement along the number line; and
- articulate the algorithm for adding and subtracting integers.
Standards: 7.NS.A.1, 7.NS.A.1.A, 7.NS.A.1.B, 7.NS.A.1.C, 7.NS.A.1.D, 7.NS.A.3