First, the problem of boundary space (2 points for each space, ***28 points)
The reciprocal of 1 is _ _ _ _; The antonym of is _ _ _ _.
2. The number 9 less than -3 is _ _ _ _; The smallest positive integer is _ _ _ _.
3. Calculation:
4. On the number axis, the number represented by point A is 2, so the number represented by a point whose distance from point A is equal to 3 unit lengths is
5. The sum of two rational numbers is 5, and one addend is–7, so the other addend is _ _ _ _.
6, a tourist attraction165438+1October 5, the lowest temperature is, the highest temperature is 8℃, then the temperature difference of this scenic spot on this day is _ _ _ _ .c
7. Calculation:
8. The square of the number is _ _ _ _; The number of cubes -64 is _ _ _ _.
9. Use a calculator to calculate:
10. Observe the laws of the following columns and fill in the blanks: 0, 3, 8, 15, 24, _ _ _ _ _.
Second, multiple-choice questions (3 points for each small question, ***24 points)
The absolute values of 1 1 and–5 are ............................................ ().
a、5 B、–5c、D、
12，in -2，+3.5，0，-0.7， 1 1。 The negative score is .................................... ().
a，l b，2 c，3 d，4。
13, in the following formula, the product of negative numbers is ............................................................... ().
A, B,
C, D,
14, which is equal to ...................................... () in the following groups.
A,–1and (–4)+(–3) b, and–(–3)
C, d and–16
15, Xiao Ming's recent math test scores are as follows: 85 points for the first time, 8 points higher than the first time and 8 points higher than the second time.
The second time was low 12, and the fourth time was higher than the third time 10. So Xiao Ming's score in the fourth exam is ........................................................................................................................
A, 90 points b, 75 points c, 9 1 minute d, 8 1 minute.
16, a stick with a length of l meters, cut off half at 1, cut off the remaining half for the second time, and so on, and the remaining length of the stick after the sixth time is ............................................ ().
A, B, C, D,
17, the largest integer not exceeding is ................................... ().
a、4 B、3 C、3 D、4
18. A store sells a commodity at a price increase of 60% based on the purchase price of 1 month, and then claims that there is a 20% discount (80%) auction in March, so the price of the commodity in March is .................................................................................. ().
A, high 12.8% b, low 12.8% c, high 40% d and high 28%.
Iii. Answering questions (***48 points)
19, (4 points) Add the following straight lines to the number axis, and then mark the following numbers on the number axis:
–3，+ 1，，- 1.5，6
20.(4 points) The average score of a math exam in Class 1, Grade 7 is 80 points. The math teacher takes the average score as the benchmark and records it as 0. The scores of Xiaolong, Xiaocong, Xiaomei, Xiaoli and Xiaogang are abbreviated as+10,–15, 0, +20,–2. Ask this.
2 1, (8 points) Compare the following logarithms.
(1) and (2) and (3) and (4) and
22, (8 points) calculation.
( 1) (2)
(3) (4)
23, (12 points) calculation.
( 1)(2)
(3) (4)
24.(4 points) It is known that the freezing temperature of water is C and that of alcohol is-1 17℃. At present, the temperature of a glass of alcohol is 12℃. If it is put into a refrigeration device, it can be reduced by 1.6℃ per minute. How many minutes should this glass of wine be frozen?
(accurate to 0. 1 min)
25.(4 points) The basic salary of the salesperson is 300 yuan per month, and the bonus system is: 300 yuan will be given a bonus if the specified turnover is reached 10000 yuan per month; If the turnover exceeds the specified index, 5% of the excess turnover will be rewarded. A clerk in this store completed the turnover of 13200 yuan in September and asked him what his income was in September.
26. Observatory.
According to the law, fill in the appropriate numbers in the boxes of the form.