Before we get started on addition of negative numbers. It’s important to understand the meaning of negative numbers first. A negative number has a value less than zero and is denoted with a minus (-) sign before it. These numbers can be integers, fractions or decimals. They include -4, -6, -15, -0.5 and -4/5. In addition to that, these numbers are placed on the left side of the number line. Moreover, these numbers are always used to represent a debt, loss or deficiency.

Just like positive numbers, you can also add negative numbers when you understand the concept. This articles explore examples to add negative numbers.

**Addition of negative numbers **

When you add a negative number to a negative number, you simply add the numbers and use the negative sign (-) in the answer. Here are simple examples:

**-20 + -30 = -50**

**-60 + -80 = -140**

**-30 + -90 = -120 **

**-50 + -200 = -250 **

**-90 +-80 = -170 **

**Applications of negative numbers**

Negative numbers are used in the fields:

**Finance **

· Refunds to a debit card and credit card.

· Annual percentage growth in a particular country (GDP).

· Rate the inflation indicating fall in normal prices.

· Interest rates can also be negative.

· It can represent a debt or deficit.

**Science **

· Temperature scale like Celsius.

· Ions with either negative or positive charge.

· Latitudes on the south of the equator and longitudes on the west of the prime meridian.

· Electrical circuits.

· Topographical features of the earth on height above sea level like Death Valley and Dead Sea.

· Directional antenna arrays can be negative.

**Sports **

· Goal difference in football or hockey and point’s difference in rugby or golf.

· Lap times in formula.

· Athletics events like hurdles, sprint races, long jump, and triple jump.

· Club points after deduction.

· Run differential in baseball.

**Others **

· Video games.

· Playing audio file.

· Working hours.

· Television game shows.

· A politician approval rating.

**Negative addition tutorial**

**Solved negative addition**

**Frequently Asked Questions**

**1. What are the rules for adding negative numbers? **

The sum of two negative number results a negative number.

**2. Where did negative numbers come from?**

The negative numbers were used by the Chinese in 200 B.C.E. They used black rods to represent negative numbers while red rods to represent positive numbers. In the 4^{th} century, a mathematician named Alexandrian Diophantus said this equation is absurd.

4X +20= 4

The mathematician argued, that the X should be -4.

In India, negative numbers are traced around (A.D 620-630).

Around 1300, a Chinese mathematician named Chu Shi-Ku gave the “rule of the sign.”

Lastly, in the 16^{th} century around 1545, the study of equation solutions began in Italy.