So how many degrees is the difference between MINUS seven degrees and seven degrees?

The difference between minus seven degrees and seven degrees is 14 degrees.

7-(-7)= 14。

In the addition and subtraction of negative numbers, if you add negative numbers, it is equivalent to subtracting the corresponding positive numbers; If the burden is reduced, it is equivalent to increasing the corresponding positive number.

The origin of negative numbers

People often encounter various quantities with opposite meanings in their lives. For example, there are surpluses and deficits in bookkeeping; When calculating the rice stored in the granary, sometimes you should remember the grain and sometimes you should remember the valley. For convenience, people think that numbers have opposite meanings. So people introduced the concepts of positive number and negative number, and recorded the excess money as positive number of grain and the loss of money and grain as negative number. It can be seen that both positive and negative numbers are produced in production practice.

According to historical records, as early as 2000 years ago, China had the concept of positive and negative numbers and mastered the arithmetic of positive and negative numbers. When people calculate, they use some small bamboo sticks to put out various figures to calculate. For example, 356 is placed in |||, 3056 is placed in, and so on. These small bamboo sticks are called "computing chips" and can also be made of bones and ivory.

Liu Hui was a scholar during the Three Kingdoms period in China, and he made great contributions to the establishment of the concept of negative numbers. Liu Hui first gave the definitions of positive numbers and negative numbers. He said: "Today's gains and losses are the opposite, and positive and negative numbers should be named." In other words, in the process of calculation, positive numbers and negative numbers should be used to distinguish.