Scores? (positive points? Negative score)

Method 2: Rational number is positive? (positive integer? Positive score)

? 0

Negative number? (negative integer? Negative score)?

The straight line that defines the origin, unit length and positive direction is called the number axis. Pay attention to three elements: origin, unit length and positive direction.

We call the distance from the corresponding point to the origin of a number on the number axis the absolute value of this number. The absolute value of a positive number is itself; The absolute value of a negative number is its reciprocal; The absolute value of zero is zero; The absolute values of two opposite numbers are equal.

Numbers with only two different symbols are called antonyms. Put a negative sign in front of this number.

First, the number axis comparison method: the number on the right of the two numbers represented on the number axis is always greater than the number on the left.

Second, the direct comparison method:

1, negative number

2. Comparing the sizes of two positive numbers, the absolute value is larger; When two negative numbers are compared in size, the number with larger absolute value is smaller.