Students learn to add and subtract positive and negative numbers by moving along a number line — discovering that adding a negative is the same as subtracting, and building the rules for signs.
Students will be able to…
If it’s −3° and the temperature rises 5°, what is it now? How do you add and subtract when negatives are involved?
Project this and set a starting number, then add a positive or negative. Watch the hop along the number line and see where you land.
Tap any phase to open the teacher moves and student actions.
−3° rises 5° — what temperature now?
Teacher models.
Class drives the Integer Mover.
Students add and subtract integers.
One integer sum.
Aligned to the Common Core State Standards for Mathematics, including the Standards for Mathematical Practice.
Apply and extend previous understandings of addition and subtraction to add and subtract rational numbers.
Understand p + q as located q away from p on a number line.
Understand subtraction as adding the additive inverse (the opposite).
Solve real-world problems with the four operations on rational numbers.
Preview the three formative checks. Tap “Sample answer” to see what mastery looks like — hide them before you print for students.
Have students explore the rules for multiplying and dividing integers (same signs → positive, different signs → negative). A printable sign-rules sheet is in the Math library.
Tap a card to flip it, then rate whether you knew it. Built from this lesson’s vocabulary.
A quick self-check with instant feedback, drawn from this lesson’s key terms.
A print-and-go review sheet with a built-in answer key. Tap “Show answer key” to reveal answers, or print the clean version for students.