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teawandjameji123456
2 năm trước
Giải bài toán giúp em với em cảm ơn
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Bài toán 4 : Tìm x, biêt. a.      5x – 16 = 40 + x b.     4x – 10 = 15 – x c.      -12 + x = 5x – 20 d.     7x – 4 = 20 + 3x e.      5x – 7 = – 21 – 2x f.       x + 15 = 7 – 6x g.     17 – x = 7 – 6x h.     3x + (-21) = 12 – 8x k.       125 : (3x – 13) = 25 l.        541 + (218 – x) = 735 m.      3(2x + 1) – 19 = 14 n.       175 – 5(x + 3) = 85 o.       4x – 40 = |-4| + 12 p.       x + 15 = 20 – 4x q.       8x + |-3| = -4x + 39 r.        6(x – 2) + (-2) = 20 – 4x Bài toán 5 : Tìm x, biết. a.      2(x – 5) – 3(x + 7) = 14 b.     5(x – 6) – 2(x + 3) = 12 c.      3(x – 4) – (8 – x) = 12 d.     -7(3x – 5) + 2(7x – 14) = 28 e.      5(3 – 2x) + 5(x – 4) = 6 – 4x f.       -5(2 – x) + 4(x – 3)  = 10x – 15 g.     2(4x – 8) – 7(3 + x) = |-4|(3 – 2) h.     8(x – |-7|) – 6(x – 2) = |-8|.6 – 50 k.       -7(5 – x) – 2(x – 10) = 15 l.        4(x – 1) – 3(x – 2) = -|-5| m.      -4(x + 1) + 89x – 3) = 24 n.       5(x – 30 – 2(x + 6) = 9 o.       -3(x – 5) + 6(x + 2) = 9 p.       7(x – 9) – 5(6 – x) = – 6 + 11x q.       10(x – 7) – 8(x + 5) = 6.(-5) + 24 Bài toán 6 : Tính tổng các số nguyên x biết. a.      -2 < x < 2 b.     -5 < x < 5 c.   -5 < x ≤ 6 d.   |x| ≤ 5 f.        24 ≤ x ≤ 2017 g.       x chẵn và 6 ≤ x ≤ 202 h.       x lẻ và 7 < x < 2017 k.       12 x  2017 và x   5 Bài toán 7. Tính các tổng sau. a) S = 1 – 2 + 3 – 4 + … + 2005 – 2006 b) S = 1 – 3 + 5 – 7 + … + 2001 – 2003 c) S = 2 – 4 + 6 – 8 + … + 2008 – 2010 Bài toán 8 : Tìm x, biết. (x + 1) + (x + 2) + (x + 3) +…+ (x + 1000) = 5750 (x -10 ) + (x - 9) + (x - 8) +…+ 10+11=11

I. Find the word which has a different sound in the part underlined. Read the words aloud. 1. A.develops B.cars C.meets D.books 2. A.walks B.kisses C.dances D.boxes 3. A.laughs B.months C.washes D.works 4. A.dies B.roses C.dishes D.rouges 5. A.asks B.makes C.stops D.windows 6. A.watches B.thanks C.changes D.passes 7. A.finishes B.puns C.buildings D.birds 8. A.catches B.wishes C.plays D.uses 9. A.lives B.cooks C.breathes D.rooms 10. A.means B.things C.practices D.fills II. Put the words in the box into three word. elephants studies changes givers lions washes helps bears places giraffes balls maths works pandas ships /s/ /z/ /iz/ III. Match column A to column B. III. Fill in the blank, using is or are. 1. There …………. a clock, two chairs and a table in my bedroom. 2. …………. there sugar in the kitchen? 3. …………. there three doors in your house? 4. There …………. tall trees around my house. 5. There …………. not water in that glass. 6. There …………. more than fifty books on my bookshelf. 7. There …………. an armchair in my room. 8. There …………. lots of orange juice in the fridge. 9. …………. there a living room, two bedrooms in your house? 10. There …………. twenty-two benches, thirty-eight desks, and fifteen bookcasesin the school. I. Complete the words. 1. I live in a a in the Town. 2. The s is in the bathroom. 3. The cutting board is b the microwave and cooker 4. The picture is on the w . 5. I feel hot. Can you turn on the a ? II. Rewrite sentences. 1. His farm has a lot of vegetables and fruits. There are . 2. There are five rooms in my apartment. My apartment has . A B 1. There is a. an apple and three oranges on the table. 2. There are b. two wastebaskets in your classroom? 3. Are there c. milk in the fridge?

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