Learning Mathematics
Use a Number Line to Explain Why Subtracting a Negative Adds
Connect subtraction to the distance between numbers, then use a number line to explain why subtracting a negative increases the result.
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negative numbers
Mathematics Explained
Why Multiplying Two Negative Numbers Gives a Positive Product
Use a multiplication pattern and the distributive law to understand why a negative multiplied by a negative gives a positive result.
Mathematics Practice
Why an Inequality Sign Reverses When You Multiply by a Negative Number
See why multiplying an inequality by a negative number reverses its direction, using a number-line example and a substitution check.