Ab is a rational number, the absolute value of a is 0, try to compare the size of a and b

Ab is a rational number, the absolute value of a is 0, try to compare the size of a and b

When b >0, b > a
When b =0,|b|<|a|ound
When b <0, b < a

When b >0, b > a
When b =0,|b|<|a|Turn
When b <0, b < a

If A, B are rational numbers, A is less than 0 and less than B, and the absolute value of A is less than the absolute value of B, compare the sizes of A+B, A-B, B-A,-A-B

Indicate A and B on the number axis. A is on the left side of the origin and close to the origin. B is on the right side of the origin and far from the origin. Therefore: A-B <-A-B < A+B < B-A

Represent A and B on the number axis. A is on the left side of the origin and close to the origin. B is on the right side of the origin and far from the origin. Therefore: A-B <-A-B < A+B < B-A