-70 + -15 = -85
Negative plus negative equals
A negative plus negative sign is equal to a negative sign
For example, negative 70 plus negative 15 is equal to negative 85
Addition rules for positive and negative numbers
1. Two same signs – (Add the numbers)
70 + 15 = 85
-70 + -15 = -85
Summary
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2. Two different signs – (Subtract the numbers)
For example:
70 + -15 = 55
-70 + 15 = -55
Summary
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It is important to be consistent with the signs when adding or subtracting integers.
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NOTE |
| A number with no negative sign at the front is always a positive number |
Negative plus Negative Calculator
Use the calculator below to add two negative numbers