When Xiao Hong is doing a question, she draws a number axis. A point a on the number axis represents - 4. Due to carelessness, she marks the origin of the number axis in the wrong position, so that the point a just falls in the opposite position of - 3. Think about it. To draw the number axis correctly, which direction should the origin move to? How many unit lengths? When Xiao Hong is working on the topic, draw a number axis. The original point a on the number axis represents the number - 4. Due to carelessness, mark the origin of the number axis in the wrong position, so that the point a just falls in the position of the opposite number of - 4. Think about it. To draw the number axis correctly, which direction should the origin move several units of length?

When Xiao Hong is doing a question, she draws a number axis. A point a on the number axis represents - 4. Due to carelessness, she marks the origin of the number axis in the wrong position, so that the point a just falls in the opposite position of - 3. Think about it. To draw the number axis correctly, which direction should the origin move to? How many unit lengths? When Xiao Hong is working on the topic, draw a number axis. The original point a on the number axis represents the number - 4. Due to carelessness, mark the origin of the number axis in the wrong position, so that the point a just falls in the position of the opposite number of - 4. Think about it. To draw the number axis correctly, which direction should the origin move several units of length?

-The opposite of 4 is 4
Using 4 - (- 4) = 8
Just draw a picture. Don't be lazy