class : .......
OO
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Cho dạng đúng của đtừ trong ngoặc:1.The dentist (fill) …………………… the cavity in my tooth and it stopped (hurt)…………………… right afterwards.2, You (need) …………………… another blanket or you (feel) …………………… warmenough?3, Did you remember (book) …………………… the seats?Oh no, I (forget) …………………… I (telephone) …………………… them now.4, Why are you taking that big basket?I (buy) …………………… a lot of vegetable.5, I (not want) …………………… to meet Paul so when he went into the room, I (leave)...
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Cho dạng đúng của đtừ trong ngoặc:1.The dentist (fill) …………………… the cavity in my tooth and it stopped (hurt)…………………… right afterwards.2, You (need) …………………… another blanket or you (feel) …………………… warmenough?3, Did you remember (book) …………………… the seats?Oh no, I (forget) …………………… I (telephone) …………………… them now.4, Why are you taking that big basket?I (buy) …………………… a lot of vegetable.5, I (not want) …………………… to meet Paul so when he went into the room, I (leave)……………………6, Tim usually (get up) …………………… and (brush) …………………… his teeth at 6.15 butyesterday he (get up) …………………… and (brush) …………………… his teeth at 7.00because it (be) …………………… Sunday.7, Nhung is very hungry now because she (not eat) …………………… enough this morning.She only (eat) …………………… a small piece of bread and (drink) …………………… a glassof milk.8, you (go) …………………… to the dentist last weekend, Hung?Yes, and I (go) …………………… there to check up the filled tooth.9, when my brother and I (be) …………………… children, we (have) …………………… twocats and a dog.10, Trang (not write) …………………… to her parents last week. She (phone)…………………… them now.11, Lien’s brother is an architect but he (not work) …………………… at the moment.12, How much it (cost) …………………… to mail a letter to England?13, You (go out) …………………… last night? Yes, I (go) …………………… to the cinemabut I (not enjoy) …………………… the movie much.14, They (travel) …………………… to the USA next month
1. (1) Filled (2) Hurting
2. (1) Do you need (2) feel
3. (1) to book (2) Forgot (3) will telephone
4. Buy
5. (1) don't want (2) had left
6. (1)gets up (2) brushes (3) got up (4) brushed (5) was
7. (1)didn't eat (2) ate (3) drank
8. Did you go
9. (1) were (2) had
10. (1) Didn't (2) will phone
11. isn't working
12. does it cost
13. (1)did you go out (2) went (3) didn't enjoy
14. will travel
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1.I’d like to live here because the people are very (friend)………2.We usually go (Swim)………..… in the morning3.Feeding the ducks is her (day) ………..work 4.(Fortunate)…………..…. He was ill on the day of the Pop festival.5.You should bring (suit)….clothes for this cold weather.6.Don’t let the child go out because it’s (wind)……….7.An (orphanage )…………. is a child whose parents are dead8.L.A Hill is a ( humor) ……………… writer 9.I’m (extreme)…….. for the delay10.She looks more …………..than her sister( beauty)11...
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1.I’d like to live here because the people are very (friend)………2.We usually go (Swim)………..… in the morning3.Feeding the ducks is her (day) ………..work 4.(Fortunate)…………..…. He was ill on the day of the Pop festival.5.You should bring (suit)….clothes for this cold weather.6.Don’t let the child go out because it’s (wind)……….7.An (orphanage )…………. is a child whose parents are dead8.L.A Hill is a ( humor) ……………… writer 9.I’m (extreme)…….. for the delay10.She looks more …………..than her sister( beauty)11.They are very …………to survive a shipwreck (luck)12.I love the ……….of summer evening in the countryside(peaceful)13.Those cats looks …….(love)14.Stop, Nam! It's..................to be near the stove. (danger)15.The glass pieces are dried........................ . (complete)16.My elder brother studies hard this year in order to pass the.........exam to the university. (enter)17.Please confirm your.............. date and time if you want to come with us. (arrive)18.I’ll make ………..for you to meet him at airport(arrange)19.Tuan ……his friend to his house on Christmas day (Invitation)20.My ……….will call you later ( assist)21.What led to the ……of the telephone?( invent)22.Mr Pipe runs his business very ……….His friend admire him ( success)23.My brother bought a new …….rod yesterday(fish)24.Their children have quite ………..character ( difference)25.He helps us out of ……………(kind)26.This school doesn’t have any sports ……….(equip)27.The new that Mr Nam had inherited a million dollars make his friend ………. (excite)28.“Ao dai” is a …………..dress of Vietnam (tradition)29.The polices are interested in the sudden ……….of the valuable paintings ( appear)30.The sayings of the sage are full of (wise)31.Who is the ……………of this black Merced? (own)32.The ….. world of Disney attracts thousands of children as well as adults.33.My car has given me excellent …………..(serve)34.they are getting along with their ………….(neighborhood)35.My mother cooked a ……….. dish last night (taste)36.My neighborhood is …………for good and cheap restaurants (fame)37.How often do you ……………your friend? (weight)38.The …………of a neighborhood is very important to it dweller (safe)39.Everyone in the neighborhood is …………….. with what we have done. (please)40.the ………….of the house is very kind to us (own)41.Mary likes attending the English ………….contest(speak)42.My sister is fond of…………………places (crowd)43.The ……………have to cook rice in this contest (participate)44.This country has a big …………..which makes cars (industrial)45.My father likes ……………..(ski)46.There were two …….yesterday: fire making and rice cooking (compete)
1.I’d like to live here because the people are very (friend)…friendly……2.We usually go (Swim)……swimming…..… in the morning3.Feeding the ducks is her (day) ……daily…..work4.(Fortunate)……Unfortunately,……..…. He was ill on the day of the Pop festival.5.You should bring (suit) suitable….clothes for this cold weather.6.Don’t let the child go out because it’s (wind)…windy…….7.An (orphanage )……orphan……. is a child whose parents are dead8.L.A Hill is a ( humor) ……humorous………… writer9.I’m (extreme)…extremely….. for the delay10.She looks more ……beautiful……..than her sister( beauty)11.They are very ……lucky……to survive a shipwreck (luck)12.I love the …peace…….of summer evening in the countryside(peaceful)13.Those cats looks …lovely….(love)14.Stop, Nam! It's......dangerous............to be near the stove. (danger)15.The glass pieces are dried........completed................ . (complete)16.My elder brother studies hard this year in order to pass the....entering.....exam to the university. (enter)17.Please confirm your......arriving........ date and time if you want to come with us. (arrive)18.I’ll make …arrangement……..for you to meet him at airport(arrange)19.Tuan invites……his friend to his house on Christmas day (Invitation)20.My …assistant…….will call you later ( assist)21.What led to the …invention…of the telephone?( invent)22.Mr Pipe runs his business very …successful…….His friend admire him ( success)23.My brother bought a new …fishing….rod yesterday(fish)24.Their children have quite …different……..character (difference)25.He helps us out of ……kindly………(kind)26.This school doesn’t have any sports …equipments…….(equip)27.The new that Mr Nam had inherited a million dollarsmake his friend …excited……. (excite)28.“Ao dai” is a ……traditional……..dress of Vietnam (tradition)29.The polices are interested in the sudden …disappear…….of the valuable paintings ( appear)30.The sayings of the sage are full of ........wishing.. (wise)31.Who is the …owner…………of this black Merced? (own)32.The world of Disney attracts thousands of children as well as adults.33.My car has given me excellent ……service……..(serve)34.they are getting along with their ……neighbors…….(neighborhood)35.My mother cooked a …tasty…….. dish last night (taste)36.My neighborhood is …famous………for good and cheaprestaurants (fame)37.How often do you ……heavy………your friend? (weight)38.The …safety………of a neighborhood is very important to itdweller (safe)39.Everyone in the neighborhood is ……pleased……….. with what we have done. (please)40.the ………owner….of the house is very kind to us (own)41.Mary likes attending the English……speaking…….contest(speak)42.My sister is fond of……crowded……………places (crowd)43.The ……participation………have to cook rice in this contest(participate)44.This country has a big …industry………..which makes cars(industrial)45.My father likes …skiing…………..(ski)46.There were two …competition….yesterday: fire making and rice cooking.
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1.I’d like to live here because the people are very (friend)…friendly……2.We usually go (Swim)……sưimming…..… in the morning3.Feeding the ducks is her (day) ……daily…..work4.(Fortunate)……Unfortunately……..…. He was ill on the day of the Pop festival.5.You should bring (suit) suitable….clothes for this cold weather.6.Don’t let the child go out because it’s (wind)…windy…….7.An (orphanage )……orphan……. is a child whose parents are dead8.L.A Hill is a ( humor) ………humorous……… writer9.I’m (extreme)…extremely….. for the delay10.She looks more ……beautiful……..than her sister( beauty)11.They are very …lucky……to survive a shipwreck (luck)12.I love the …peace…….of summer evening in the countryside(peaceful)13.Those cats looks …lovely….(love)14.Stop, Nam! It's.........dangerous.........to be near the stove. (danger)15.The glass pieces are dried...........completed............. . (complete)16.My elder brother studies hard this year in order to pass the.....entering....exam to the university. (enter)17.Please confirm your........arriving...... date and time if you want to come with us. (arrive)18.I’ll make ……arrangement…..for you to meet him at airport(arrange)19.Tuan …invites…his friend to his house on Christmas day (Invitation)20.My …assistant…….will call you later ( assist)21.What led to the …invention…of the telephone?( invent)22.Mr Pipe runs his business very …successfully….His friend admire him ( success)23.My brother bought a new …fishing….rod yesterday(fish)24.Their children have quite …different……..character ( difference)25.He helps us out of ……kindness………(kind)26.This school doesn’t have any sports ……equipment….(equip)27.The new that Mr Nam had inherited a million dollars make his friend …excited…….(excite)28.“Ao dai” is a ……traditional……..dress of Vietnam (tradition)29.The polices are interested in the sudden ……disappear….of the valuable paintings ( appear)30.The sayings of the sage are full of wisdom (wise)31.Who is the ……owner………of this black Merced? (own)32.The ….. world of Disney attracts thousands of children as well as adults.33.My car has given me excellent ……service……..(serve)34.they are getting along with their ……neighbors…….(neighborhood)35.My mother cooked a ……tasty….. dish last night (taste)36.My neighborhood is …famous………for good and cheap restaurants (fame)37.How often do you ……weigh………your friend? (weight)38.The …safety………of a neighborhood is very important to it dweller (safe)39.Everyone in the neighborhood is ……pleased……….. with what we have done. (please)40.the …owner……….of the house is very kind to us (own)41.Mary likes attending the English ……speaking…….contest(speak)42.My sister is fond of………crowed…………places (crowd)43.The ……participants………have to cook rice in this contest (participate)44.This country has a big …industry………..which makes cars (industrial)45.My father likes ………skiing……..(ski)46.There were two …competitions….yesterday: fire making and rice cooking (compete)
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Với bài tập : Tính tổng S(−2,3)+(+41,5)+(−0,7)+(−1,5)S(−2,3)+(+41,5)+(−0,7)+(−1,5), hai bạn Hùng và Liên đã làm như sau : Bài làm của Hùng :S (−2,3) + (+41,5) + (−0,7) + (−1,5)S [(−2,3) + (−0,7) + (−1,5)] + 41,5S (−4,5) + 41,5S 37 Bài làm của Liên :S (−2,3) + (+41,5) + (−0,7) + (−1,5)S [(−2,3) + (−0,70] + [(+41,5) + (−1,5)]S (−3) + 40S 37 a) Hãy giải thích cách làm của mỗi bạn.b) Theo em nên làm cách nào ?Các bạn làm nhanh giúp mình nha, mình đang cần gấp ! Thanks các bạn !
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Với bài tập : Tính tổng S=(−2,3)+(+41,5)+(−0,7)+(−1,5)S=(−2,3)+(+41,5)+(−0,7)+(−1,5), hai bạn Hùng và Liên đã làm như sau :
Bài làm của Hùng :S = (−2,3) + (+41,5) + (−0,7) + (−1,5)S = [(−2,3) + (−0,7) + (−1,5)] + 41,5S = (−4,5) + 41,5S = 37 Bài làm của Liên :S = (−2,3) + (+41,5) + (−0,7) + (−1,5)S = [(−2,3) + (−0,70] + [(+41,5) + (−1,5)]S = (−3) + 40S = 37 a) Hãy giải thích cách làm của mỗi bạn.b) Theo em nên làm cách nào ?Các bạn làm nhanh giúp mình nha, mình đang cần gấp ! Thanks các bạn !
sớt gg bài ... trang...sgk 7 j đó sẽ ra
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a, Hùng cộng hai số lần lượt từ trái qua phải. Liên sử dụng tính chất giao hoán và kết hợp
b, Theo em nên làm theo cách của bạn Liên vì cáh đó làm sẽ nhanh hơn và không bị nhầm lẫn.
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a) Bạn Hùng áp dụng tính chất giao hoán để nhóm các số hạng cùng dấu lại rồi thu gọn sau đó tính tổng hai số thập phân trái dấu. Bạn Liên nhóm cặp các số hạng một cách hợp lý thu gọn rồi tính tổng hai số hạng trái dấu.
b) Theo em trong trường hợp trên nên làm theo cách của Liên vì nó dễ làm hợp lý và lời giải đẹp hơn.
Chúc bạn học tốt...!
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VH
12 tháng 12 2021 lúc 10:56
Dạng 1: Thực hiện phép tính:1. 68 + 32 + 18;2. 315 + 172 - 72 + 75;3. 84 + 325 + (116 - 325) - (-40);4. 214 + (-54) + (-14) + (-46);5. 8.25.29.22.125;6. 12.141 - 12.41;7. 25.154 - 25 + 47.25;8. 25.(215 + 170) + 170.25 + 215.175;9. [530 + 4.(12 - 7)30] : 529;10. 245 - [(32 - 22).10 - 5];11. 25.23 - (9 - 14) + (29 - 34 + 20);12. 25+(45-126+174)-(174+145-126);13. 27 : {480 : [400 - (120 + 24.5)]};14. 17+(-20)+(23+9-26)+...+53+(-56).giúp mình với mình đang cần gấp
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Dạng 1: Thực hiện phép tính:
1. 68 + 32 + 18;
2. 315 + 172 - 72 + 75;
3. 84 + 325 + (116 - 325) - (-40);
4. 214 + (-54) + (-14) + (-46);
5. 8.25.29.22.125;
6. 12.141 - 12.41;
7. 25.154 - 25 + 47.25;
8. 25.(215 + 170) + 170.25 + 215.175;
9. [530 + 4.(12 - 7)30] : 529;
10. 245 - [(32 - 22).10 - 5];
11. 25.23 - (9 - 14) + (29 - 34 + 20);
12. 25+(45-126+174)-(174+145-126);
13. 27 : {480 : [400 - (120 + 24.5)]};
14. 17+(-20)+(23+9-26)+...+53+(-56).
giúp mình với mình đang cần gấp
Cho m(g)1 oxit sắt phản ứng vừa đủ với 0,75 mol H2SO4, thu được dung dịch chỉ chứa 11 muối duy nhất và 1,68(l) khí .SO2. Giá trị của m?A.24B.34,8 C.10,8D.46,4
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Cho m(g)1 oxit sắt phản ứng vừa đủ với 0,75 mol H2SO4, thu được dung dịch chỉ chứa 11 muối duy nhất và 1,68(l) khí .SO2.
Giá trị của m=?A.24B.34,8 C.10,8D.46,4
Áp dụng định luật bảo toàn khối lượng.
nH2O =n H2SO4=0.75
suy ra khối lượng nước=13,5 g
n Fe2(so4)3=1/3*(h2so4-so2)= 1/3*(0,75-0,07...
suy ra khối lượng muối=90
khối lượng h2so4=73,5 g
khối lượng so2=4,8 g
m=90+13,5+4,8-73,5=34,8 g
=> Chọn B
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VH
12 tháng 12 2021 lúc 10:01
Dạng 1: Thực hiện phép tính:1. 68 + 32 + 18;2. 315 + 172 - 72 + 75;3. 84 + 325 + (116 - 325) - (-40);4. 214 + (-54) + (-14) + (-46);5. 8.25.29.22.125;6. 12.141 - 12.41;7. 25.154 - 25 + 47.25;8. 25.(215 + 170) + 170.25 + 215.175;9. [530 + 4.(12 - 7)30] : 529;10. 245 - [(32 - 22).10 - 5];11. 25.23 - (9 - 14) + (29 - 34 + 20);12. 25+(45-126+174)-(174+145-126);13. 27 : {480 : [400 - (120 + 24.5)]};14. 17+(-20)+(23+9-26)+...+53+(-56)tôi sẽ tick cho ai chả lời nhanh nhất
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Dạng 1: Thực hiện phép tính:
1. 68 + 32 + 18;
2. 315 + 172 - 72 + 75;
3. 84 + 325 + (116 - 325) - (-40);
4. 214 + (-54) + (-14) + (-46);
5. 8.25.29.22.125;
6. 12.141 - 12.41;
7. 25.154 - 25 + 47.25;
8. 25.(215 + 170) + 170.25 + 215.175;
9. [530 + 4.(12 - 7)30] : 529;
10. 245 - [(32 - 22).10 - 5];
11. 25.23 - (9 - 14) + (29 - 34 + 20);
12. 25+(45-126+174)-(174+145-126);
13. 27 : {480 : [400 - (120 + 24.5)]};
14. 17+(-20)+(23+9-26)+...+53+(-56)
tôi sẽ tick cho ai chả lời nhanh nhất
VH
12 tháng 12 2021 lúc 9:39
1. Tính hợp lý:(a) (-2) + 7 + (-12) + 17 + ... + (-52) + 57;(b) 1 + 2 - 3 - 4 + 5 + 6 - 7 - 8 + ... - 79 - 80 + 812. Tìm x ∈ Z, biết:(a) (-1) + 3 + (-5) + 7 + ... + x 600;(b) 2 + (-4) + 6 + (-8) + ... + (-x) -2000.3. Tìm cặp số (x; y) ∈ N* sao cho 2xy + 4x + 3y - 36 04. Tìm số tự nhiên n để (10 - 2n) ... (n - 2)5. Tìm số nguyên x để x2 + 2x + 2có giá trị nguyên.6. Chứng minh rằng: Với mọi số tự nhiên n thì (2n + 1) và (4n + 4) nguyên tố cùngnhau.
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1. Tính hợp lý:
(a) (-2) + 7 + (-12) + 17 + ... + (-52) + 57;
(b) 1 + 2 - 3 - 4 + 5 + 6 - 7 - 8 + ... - 79 - 80 + 81
2. Tìm x ∈ Z, biết:
(a) (-1) + 3 + (-5) + 7 + ... + x = 600;
(b) 2 + (-4) + 6 + (-8) + ... + (-x) = -2000.
3. Tìm cặp số (x; y) ∈ N* sao cho 2xy + 4x + 3y - 36 = 0
4. Tìm số tự nhiên n để (10 - 2n) ... (n - 2)
5. Tìm số nguyên x để x2 + 2
x + 2
có giá trị nguyên.
6. Chứng minh rằng: Với mọi số tự nhiên n thì (2n + 1) và (4n + 4) nguyên tố cùng
nhau.
(2x2+x-6)+3(2x2+x-3)-90(x-2)(x-3)(x-5)(x-6)31(x2-8x+12)+128giải phương trình giúp mik vs
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(2x2+x-6)+3(2x2+x-3)-9=0
(x-2)(x-3)(x-5)(x-6)=31(x2-8x+12)+128
giải phương trình giúp mik vs
(2x2+x-6)+3(2x2+x-3)-9=0
\(\Leftrightarrow\) 2x2 + x - 6 + 6x2 + 3x - 9 - 9 = 0
\(\Leftrightarrow\)2x2 + 6x2 + 3x + x = 6 + 9 + 9
\(\Leftrightarrow\)8x2 + 4x = 24
\(\Leftrightarrow\)8x2 + 4x - 24 = 0
\(\Leftrightarrow\)(x+2)(8x-12) = 0
\(\Leftrightarrow\)x + 2 = 0 hoặc 8x - 12 = 0
1) x + 2 = 0 \(\Leftrightarrow\)x = -2
2)8x - 12 = 0 \(\Leftrightarrow\)8x = 12 \(\Leftrightarrow\)x = \(\frac{12}{8}\)
Vậy Tập nghiệm của phương trình đã cho là S ={ -2 ; \(\frac{12}{8}\)}
BT
18 tháng 9 2016 lúc 12:16
giải phương trình sau : a) tanfrac{x}{2}tanx ; b) tan(2x+10o)+cotx0 ; c) (1−tanx)(1+sin2x)1+tanx ; d) tanx+tan2xsin3xcosx ; e) tanx+cot2x2cot4x
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giải phương trình sau : a) tan\(\frac{x}{2}\)=tanx ; b) tan(2x+10o)+cotx=0 ; c) (1−tanx)(1+sin2x)=1+tanx ; d) tanx+tan2x=sin3xcosx ; e) tanx+cot2x=2cot4x
BT
18 tháng 9 2016 lúc 18:23
giải phương trình sau : a) tanfrac{x}{2}tanx ; b) tan(2x+10o)+cotx0 ; c) (1−tanx)(1+sin2x)1+tanx ; d) tanx+tan2xsin3xcosx ; e) tanx+cot2x2cot4x
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giải phương trình sau : a) tan\(\frac{x}{2}\)=tanx ; b) tan(2x+10o)+cotx=0 ; c) (1−tanx)(1+sin2x)=1+tanx ; d) tanx+tan2x=sin3xcosx ; e) tanx+cot2x=2cot4x