First, multiple-choice questions:
1, this score can't be 0, and the value is (b)
A, B, C, D,
2. If the value of the score is 0, then the following score is (D)
A, B, C, D,
3. Enlarge all the scores by 15 times, and the value of the score is ().
A, expand 15 times b, and shrink to the original c, which is the original d number, unchanged.
4, score: medium, the simplest score is ()
a， 1 b，2 c，3 d，4
5, the following is correct ()
A, B,
C, D,
6. If the value of the fractional sum is reciprocal, it is equal to ().
A, B, C, D,
7, for the score, when, the following statement is correct ()
A, the score is meaningless b, the value of the score is 1 C, the value of the score is 0 D, and the value of the score is.
8. If the formula expressed by is ()
A, B, C, D,
9, a canteen has tons of coal, originally planned to burn tons every day, and now it saves tons every day. The number of days to burn more than originally planned is ().
A, B, C, D,
10, if it is equal to ()
A, B, C, D,
Second, fill in the blanks:
1 1, in the following formula: ①; ② ; ③ ; ④ ; ⑤ 。 Among them, there are scores (fill in the serial number)
12, do not change the value of the fraction, so that the numerator and denominator of the fraction do not contain negative signs.
;
13, if it doesn't make sense, then the relationship with is.
14、 = ;