volume_mute
Operations with Negative Numbers
publish date: 2026/05/23 08:46:47.845028 UTC
volume_muteClassify each of the following expressions as Positive, Negative, or Zero.
drag and drop the selected option to the right place
Correct Answer
(1) \((-3) \times (-4)\),Positive
(2) \((-5) \times 3\),Negative
(3) \((-7) \div (-7)\),Positive
(4) \(0 \times (-99)\),Zero
Explanation
The sign rules: negative × negative = positive; negative × positive = negative; negative ÷ negative = positive; any number × 0 = 0. These rules are justified by the requirement that equations be solvable consistently.
Reference
Introduction to Differential Calculus (Systematic Studies with Engineering Applications for Beginners) - 2012