How to add and subtract integers mentally
Struggling with positive and negative numbers?
In this lesson, you’ll learn how to add, subtract, multiply, and divide integers step by step , using simple rules that make everything easy to understand.
No confusion. No complicated methods. No number line required.
We start by revising what integers are, then move into the two powerful rules for adding and subtracting integers mentally. After that, we break down the simple sign rules for multiplying and dividing integers — so you can solve questions quickly and confidently.
In this video, you will learn:
✔ What integers are (positive, negative, and zero)
✔ The 2 rules for adding and subtracting integers
✔ How to handle different signs correctly
✔ Why subtracting a negative becomes addition
✔ The easy sign rule for multiplication
✔ The easy sign rule for division
✔ How to simplify expressions like 2 − (−3)
By the end of this lesson, you’ll be able to solve integer problems in your head without drawing a number line.
Practice Questions:
−7 + (−8)
4 − (−10)
Drop your answers in the comments.
Also watch:
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