Видео с ютуба Negativenumbers
Math Antics - Negative Numbers
Negative Numbers
A Trick for Adding and Subtracting Negative Numbers
Negative Numbers: An Overview
Negative Numbers
Negative Numbers are confusing (even for Euler)
Positive and Negative Numbers for Kids | Homeschool Pop
Negative numbers introduction | Negative numbers and absolute value | Pre-Algebra | Khan Academy
Adding and subtracting negative numbers | Pre-Algebra | Khan Academy
Rules of Positive and Negative Signs in Math
Изучите положительные и отрицательные числа — простой СОВЕТ, чтобы запомнить правила!
How to Subtract Negative Numbers | Subtracting Negative Numbers
How to Add Negative Numbers | Adding Negative Numbers (Integers)
The Mathematical Reasons Why Negative Times Negative Equal To Positive
Adding and Subtracting Negative Numbers