Understanding subtracting negatives with a real-world example
Have you ever wondered why subtracting two negative numbers results in adding a positive number? The idea of “minus and minus making a plus” might seem tricky at first, but once you understand it, the math behind it becomes straightforward.
To help you grasp this concept, we’ve created an educational explainer video. In this real-world example, we use a scale, a weight, and a helium balloon to demonstrate subtracting negatives in action.
By seeing this principle in a real-world context, you’ll understand how “minus and minus” leads to a positive result.
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References:
The method of comparing positive and negative numbers with a weight and balloon, along with the overall didactic principle and the principal construction of the scale, are taken from:
- Arnold, I. Negative Numbers in the Algebra Course: A Guide for Teachers. 1947.
Further reading:
Interested in exploring more? Check out these articles where we explain the usage of negative numbers in real-world settings: