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Addition and Subtraction of Rational Numbers

7th Grade · Math · Open Global Math

8 lessons

Goal

Add and subtract signed fractions and decimals, interpret subtraction as adding the opposite, and calculate distance as |p - q|.

8 lessons
0 of 8 done
  1. Adding Rational Numbers with Same and Different SignsUp next
  2. Interpreting Subtraction as Adding the Additive InverseNot started yet
  3. Subtracting Positive and Negative Fractions and Mixed NumbersNot started yet
  4. Subtracting Positive and Negative DecimalsNot started yet
  5. Distance Between Two Rational Numbers on a Number LineNot started yet
  6. Applying Commutative and Associative Properties to Rational AdditionNot started yet
  7. Multi-Step Addition and Subtraction with Decimal NumbersYou are here
  8. Solving Multi-Step Real-World Additive Problems with Rational NumbersNot started yet
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Learning standards covered

GlobalOGM.8.NO.3Open Global Math Standards 2026™ · 7th Grade

Apply and extend the properties of addition and subtraction to rational numbers; interpret p - q as p + (-q), calculate the distance between rational numbers on a number line as |p - q|, and solve multi-step additive problems in real-world contexts.