how do i explaine 0-1=-1 ,can you please send me the deatils

Question

how do i explaine this 0-1=-1, can you give me brife

Answer 1

One way to explain this is to think of a thermometer. At 0 degrees Celsius we call this "freezing".

A temperature of 1°C is one degree above freezing represented by 0+1=1. One degree below freezing is represented by 0-1=-1°C.

Now the thermometer is like a number line. All temperatures above freezing are above the zero point on the thermometer and all below freezing are below the zero point. If you lie the thermometer on its side you get a number line with all positive numbers ("above freezing") on the right and all negative numbers ("below freezing") on the left. So zero simply separates the positive and negative numbers.