56 > ... > 54
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54. The garden is behind my classroom. => My classroom ........is in front of the garden...........
55. Why don't we go to the movies tonight? => What about .............going to the movies tonight..............?
56. There are four people in his family. => His family .............has 4 people.................
57. He goes to work at seven fifteen. => He goes to work at a ................quarter past seven.................
58. The building is old. => It ........................is an old building. ...............
51. " What language do you speak ?" Mr.Brown said to me.
-> Mr.Brown asked Mary......What language she spoke..................
52. " What's your hobby ?" The teacher said to me.
-> The teacher......asked me what my hobby was............
54. Miss White asked me " Why are you crying?"
-> Miss White asked me .....why i was crying......
55. She said " What do you think about listening to these songs right now, Peter ?"
-> She asked .....peter what he thought about listening to those songs then .........
56. They said to her " Where will your father leave here for the USA ?"
-> They......asked her where her father would leave there for the usa...........
57. I said to the salesman " How much does this dress cost today?"
-> I ......asked the salesman how much that dress costed that day..........
58. I said " Which of these pictures do you like best , Mr.Pike?"
-> I asked........mr pike which of those pictures he liked best.....
Bài 1:
Fe = 56 đvC ===> Nguyên tử khối của sắt là 56 đơn vị cacbon
MFe = 56 gam ===> Khối lượng mol của sắt là 56 gam
CuSO4 = 160 đvC ==> Phân tử khối của đồng(II)sunfat là 160 đơn vị cacbon
MCuSO4 = 160 gam ==> Khối lượng mol của đồng(II) sunfat là 160 gam
- nguyên tử khối của sắt là 56 đơn vị cacbon
- khối lượng mol của sắt là 56 g/mol
- 2 cái cuối cũng làm tương tự như vậy
- phân biệt ()4: là chỉ số của nhóm nguyên tử luôn đi liền vs các gốc axit như SO4, HSO4...
\(\left(y+\frac{1}{3}\right)+\left(y+\frac{1}{9}\right)+\left(y+\frac{1}{27}\right)+\left(y+\frac{1}{81}\right)=\frac{56}{81}\)
\(\Leftrightarrow4y+\left(\frac{1}{3}+\frac{1}{9}+\frac{1}{27}+\frac{1}{81}\right)=\frac{56}{81}\)
\(\Leftrightarrow4y+\frac{40}{81}=\frac{56}{81}\)
\(\Leftrightarrow4y=\frac{56}{81}-\frac{40}{81}\)
\(\Leftrightarrow4y=\frac{16}{81}\)
\(\Rightarrow y=\frac{16}{81}\div4\)
\(\Rightarrow y=\frac{4}{81}\)
Vậy y có giá trị =\(\frac{4}{81}\)
a, ta vẽ góc ABC bằng 56 độ ( lưu ý ta cho tia BC ở dưới, tia BA ở trên)
b,ta vẽ góc ABC' kề bù với góc ABC tức là vẽ tia đối của tia BC là tia BC'. Ta tính như sau:
Có: góc ABC' + góc ABC = 180 độ( do hai góc kề bù)
góc ABC' = 180 độ - góc ABC
góc ABC' = 180 độ - 56 độ
góc ABC' = 124 độ
c, ta vẽ góc C'BA' kề bù với góc ABC' tức là vẽ tia đối của tia BA là tia BA' .
C1: Có : góc A'BC' + C'BA = 180 độ( hai góc kề bù)
góc A'BC' = 180 độ - góc C' BA
góc A'BC' = 180 độ - 124 độ
góc A'BC' = 56 độ.
C2: Có góc C'BA' = góc ABC ( hai góc đối đỉnh)
mà góc ABC = 56 độ( theo đề bài)
=> góc C'BA' = góc ABC = 56 độ
a, ta vẽ góc ABC bằng 56 độ ( lưu ý ta cho tia BC ở dưới, tia BA ở trên)
b,ta vẽ góc ABC' kề bù với góc ABC tức là vẽ tia đối của tia BC là tia BC'. Ta tính như sau:
Có: góc ABC' + góc ABC = 180 độ( do hai góc kề bù)
góc ABC' = 180 độ - góc ABC
góc ABC' = 180 độ - 56 độ
góc ABC' = 124 độ
c, ta vẽ góc C'BA' kề bù với góc ABC' tức là vẽ tia đối của tia BA là tia BA' .
C1: Có : góc A'BC' + C'BA = 180 độ( hai góc kề bù)
góc A'BC' = 180 độ - góc C' BA
góc A'BC' = 180 độ - 124 độ
góc A'BC' = 56 độ.
C2: Có góc C'BA' = góc ABC ( hai góc đối đỉnh)
mà góc ABC = 56 độ( theo đề bài)
=> góc C'BA' = góc ABC = 56 độ
50 When did you learn to drive?
-> How long is it ..........since you learnt to drive?.............
51 The last tiem I went swimming was when we were in Spain
-> I haven't............gone swimming was since we were in Spain................
52 You haven't tidied this room for weeks
-> It's weeks...........since you last tidied this room..........
53 We started looking for a flat 2 months ago and we are still looking
-> We have.......looked for a flat for 2 months and we are still looking.........
54 This is the first time I've been to a night club
-> I haven't........been to a night club before ....................
55 They have never heard such a thing before
-> This is the first time......they have heard such a thing............
56 No one has cha;;enged his authority before
-> This is the first tiem.......you has changed his authority.............
57 She left university 2 years ago
-> It is................2 years since she last left university...........
50 When did you learn to drive?
-> How long is it ......since you learnt to drive.................
51 The last tiem I went swimming was when we were in Spain
-> I haven't......gone swimming since we were in Spain.......................
52 You haven't tidied this room for weeks
-> It's weeks..........You haven't tidied this room.............
53 We started looking for a flat 2 months ago and we are still looking
-> We have.......looked for a flat for 2 months and we are still looking................
54 This is the first time I've been to a night club
-> I haven't........... been to a night club before.................
55 They have never heard such a thing before
-> This is the first time........They have heard such a thing ..........
56 No one has cha;;enged his authority before
-> This is the first tiem....has been changed his authority................
57 She left university 2 years ago
-> It is...........2 years since She left university ........................
21 x 56 - x = 1000
1176 - x = 1000
x = 1176 - 1000
x = 176
tk mk nha
a/ 56 =2^3 . 7 và 140 = 2^2 . 5 . 7 UCLN là 2^2 . 7 = 28
b/ 24 = 2^3 . 3 ; 84 = 2^2 . 3 . 7 và 180 = 2^2 .3^2 .5 UCLN là 2^2 .3 = 12
c/ 60 = 2^2 . 3 . 5 và 180 = 2^2 .3^2 . 5 UCLN là 2^2 . 3 . 5 = 60
a) Ta có 56 = 23 . 7; 140 = 22 . 5 . 7. Do đó ƯCLN (56, 140) = 22 . 7 = 28;
b) Ta có 24 = 23 . 3; 84 = 22 . 3 . 7; 180 = 22 . 32 . 5.
Vậy ƯCLN (24, 84, 180) = 22 . 3 = 12.
c) Vì 180 60 nên ƯCLN (60, 180) = 60;
d) ƯCLN (15, 19) = 1
TL
55
TK cho m
HT
55 nhé bạn ơi