Give me the addition and subtraction of 50 rational numbers, similar to (- 7) + + 2

Rational number addition and subtraction exercises:
1,（-8）+（-5）=
2,（+8）+（-5）=
3,( - 8 ) + ( + 5) =
4,(-0.5)+ (1/2) =
5,0 + ( -3 / 2 ) =
6,| - 8 | - | - 5 | = .
7,（+ 3.5）+（– 8.5 ）=
8,( – 0.7 )+( – 0.3 )=
9,（– 4 ）+（ – 5 ）=
10,5 +（ –6 ）=
11,（ – 7 ）+10=
12,（ – 2 ）+ 2 =
13,（ – 2.5 ）+( – 3.5 ) =
14,7 + ( – 9 )=
15,（– 1.8）+ 0.2 + ( – 1.5 ) + ( – 0.3 ) + 1.5 + 0.1=
16,（ –10 ）+ 7=
17,（–2.5）+(–52.6) =
18,(–8)+(+21)+(–12)=
19,(+30)+(–17.5)+(–20)+(+17.5)=
20,0–（–3）=
21,–3–（–7.5）=
22,（–2）+（–7）–（–5）+（–6）=
23,（–23）–（–27）–27=
24,（–1）+（+2）–（–3）–（–4）=
25,（+6）–（+4）+7–（–2）= \x09
26,（–1/2 ）+（–1/3 ）–（+1/4）+（+1/5 ）=
27,（5/6）–（+3/4）+(-1/7)–（–1/2）= \x09
28（–1/3 ）+（–2/3 ）–（+3/4 ）+（+4/5 ）=
29,（–5/6 ）-（+4/3 ）+（-5/4 ）-（-3/5 ）=
30,（+5/3 ）-（–8/3 ）+（+7/4 ）-（+8/5 ）=
31, use ">", "<" or "=" to connect the following forms:
(1) │（– 4）+（– 5）│______ │– 4│+│– 5│
(2) │（– 4）+（+ 5）│ _______ | – 4| + |+ 5|
32, the formula is 5 – 7, which is regarded as subtraction, and the subtraction is____ As an addition operation, the first addend is 5, and the second addend is 5________
The following statement is wrong ()
A. Subtracting – 2 is equal to adding 2, a – B < 0, indicating that B is greater than a
C. If a and B are opposite to each other, then a + B = 0 D. if the absolute values of a and B are equal, then the two numbers are equal
The height of Xinxin was 156cm last year and 163cm this year, so Xinxin's height increased by () M
A、0.7\x09 B、–0.07 \x09C、0.07\x09 D、–0.7
If the sum of two negative numbers is a and the difference is B, then the relationship between a and B is ()
A、a＞b\x09 B、a=b\x09 C、a＜b\x09 D、a≤b
If M is a positive number and N is a negative number, then the size relation of M, m – N and M + n is ()
A、m＞m–n＞m+n\x09\x09 B、m+n＞m＞m–n
C、m–n＞m+n＞m\x09\x09 D、m–n＞m＞m+n
37. In (– 5) – () = – 7, ()
A、–2 \x09B、2\x09 C、–12\x09 D、12
38. The following statements are wrong ()
① If the difference between two numbers is positive, then both numbers are positive
② If two numbers are opposite to each other, the difference is zero
③ Zero minus any rational number, the difference is the opposite of the number
A. 0 x 09B, 1 x 09C, 2 x 09d, 3
39, minus a positive number, the difference must be () subtracted
A. It is not sure who is bigger than, equal to, or less than
If M + | - 20 | = | m | + | 20 |, then M must be ()
A. Any rational number, any non negative number
C. Any non positive number, any negative number
41. The correct one in the following statement is ()
A. Add two negative numbers and subtract the absolute value
B. Positive plus negative, sum is positive, negative plus positive, sum is negative
C. When two positive numbers are added, the sum is positive; when two negative numbers are added, the sum is negative
D. The sum of two rational numbers is equal to the sum of their absolute values
42. If one number is 10 and the other number is 2 larger than the opposite number of 10, then the sum of the two numbers is ()
A.18 B.-2 C.2 D.-18
43, if the difference between two numbers is negative, then the two numbers ()
A. All negative numbers B. one is positive and the other is negative
C. The subtracted is greater than the subtracted D. the subtracted is less than the subtracted
44, if B < 0, then in a, A-B, a = B, the largest is ()
A. A, b.a-b, C.A = B, D. It depends on the sign of A
45, the distance between the two points corresponding to – 4 and 4.5 on the number axis can be calculated____________
46, add "+" or "–" before the numbers 3, 4, 5, 6, 7, 8 and 9 to make the sum of them – 10. Please come up with a variety of solutions as far as possible
47. A motorcycle factory plans to produce 250 motorcycles a day this week. As workers take turns off, the number of people going to work every day is not necessarily equal. The actual daily production is compared with the planned quantity in the following table (the number of increased motorcycles is positive, and the number of decreased motorcycles is negative)
Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, July
Increase or decrease
What is the actual total production this week? Compared with the planned production, has it increased or decreased? How many vehicles have been increased or decreased?
48. Someone bought 8 sets of children's clothes with 400 yuan and prepared to sell them at a certain price. If the price of each set of children's clothes is 55 yuan, the excess is recorded as a positive number, and the deficiency is recorded as a negative number. The record is as follows: 2, - 3, + 2, + 1, - 1,
- 2,0, - 2, when he sells these 8 sets of children's clothing, is it a profit or a loss? How much is the profit or (loss)?
49, there are 1, 2, 3, 4 11, 12, a total of 12 numbers, try to add a negative sign in front of some numbers, so that the sum of them is 0
50,. At - 44, - 43, - 42 0,1,2,3,… What is the sum of the first 100 integers in the string of 20052006?

How much addition and subtraction do you learn in the first grade of primary school

Within 20 for the first term and 100 for the second term

The teaching of English grammar
I don't understand the grammar of the third person singular, predicate, subject and object. Do you want to memorize all the words in the English word list? It's hard to memorize them all. If you memorize this unit and forget that unit, what can you do? Please teach me. The final exam is coming. I'll appreciate it. Unfortunately, I don't have any wealth

The singular third person is he she. For you, other people are the third person. He as the subject is the predicate verb followed by s or es. the noun as the subject, put at the beginning of the sentence, the action word is the verb, put in the sentence, that is the predicate verb. There are many kinds of verbs, what you learn now is the verb be, If you remember the phonetic symbols, you will soon remember the words. If you remember the words, you should also remember the Chinese meaning, otherwise it will be meaningless. Are you satisfied?

Seventh grade English grammar problems! ~ simple! Online and so on, only a few problems!
（）Let's play in the street. Father tells me do so.
A.not to；not to B.not；not to C.don't；to not D.not to；don't
（）The pandas are__ cute.
A.kind of B.a kind of C.all kinds of D.kinds of

1.B
Let's not do sth
tell sb not to do sth
2.A
A little panda is a little cute

Sentence pattern conversion:
You can come to my house by taxi
You can___ a_ to my house.
The bank is on the right of the bookstore and the restaurant is on the left of
The book
The bookstore is_ the bank_ the restaurant.
I don't know how to get to Wangfujing Street
I don't know_ _ to Wangfujing Street.
The pay phone is across from the supermarket
_ ___ the pay phone?

You can take a taxi to my house.
The bookstore is between the bank and the restaurant.
I don't know how arrive to Wangfujing Street.
Where is the pay phone?

Two English grammar problems in Grade Seven
1.——When did the Curies win the Nobel Prize _ Physics?
——In 1903.
A.of B.for C.about D.with
2.I dreamt _ my sister in Paris last night.
A.of B.with C.on D.at
[Note: and explain the related grammar or fixed phrase

1.B the Nobel Prize for
2.A.dream of
They are all fixed phrases. Just remember them

English learning and Translation

Where can I sell the English comprehensive exercise book of Oxford Edition in Shenzhen?

Central Bookstore

Unit 4
1. Morphological transformation
No (homonym)_
Translate the following phrases into English
Number the item
Dialogue in the picture____
One more
She books are in the desk

No: know
Number the things
The conversations in the picture

Unit 6
A：Mom,what are we going to () for dinner?
B：How () chicken?Your sister () chicken very much.
A：Oh, mom.Chickenis too （） .We have chicken every（） .Can we have something different?
B：The （）have beef.
A：Great!Beef is my （） food.Well ,Let's think （） the vegetables.
B：（）you want to have tomatoes?
A：Well,it's OK for me.But sister （）（） them.Maybe we can have potatoes.
B：OK.（）have beef and potatoes （）.

have
is
likes
often,day,
menu
favorite,about
do
doesn't ,like
let's,together

Give me the addition and subtraction of 50 rational numbers, similar to (- 7) + + 2