Urgent for the judgment and calculation of the absolute value of mathematics in the first volume of the seventh grade! ! ! ! ! ! ! 1 1

absolute value

First, multiple choice questions

1. The absolute value is the smallest number ()

A.B.0 C. 1 D.- 1 does not exist.

2. When the negative number gradually becomes larger (but remains negative) ()

A. its absolute value gradually increases.

B.its reciprocal is getting bigger and bigger.

C. its absolute value gradually decreases.

D. the absolute value of its reciprocal gradually increases.

Second, fill in the blanks

1. If |- 1 | = 0, then = _ _ _, if | 1-| = 1, then = _ _ _.

2. The reciprocal of a number is oneself, this number is _ _ _ _, the reciprocal of a number is oneself, and this number is _ _ _ _.

3. If the reciprocal of is 5, the value of is _ _ _ _ _.

4. If a number is less than its absolute value 10, it is _ _ _ _.

5. If, and, then _ _ _.

Third, answer questions.

The symbol of (1) is a plus sign, and the number with an absolute value of 8.5 is _ _ _ _ _ _ _.

(2) The symbol is a negative sign, and the number with an absolute value of 8.5 is _ _ _ _ _ _ _.

(3) The symbol of-85 is _ _ _ _ _ _ _, and the absolute value is _ _ _ _ _ _.

(4) (5) The absolute value of _ _ is equal to 7.2.

(6) The number whose absolute value is equal to is _