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1 tháng 8 2015

Giải TV nè:
Ta có: 2 bút+3 tẩy=60000đ (A)
3 bút+1 thước=75000đ (B)
Gấp các gt ở B lên 2 lần, gấp các gt ở A lên 3 lần, ta có:
6 bút+9 tẩy=180000đ (C)
6 bút+2 thước=150000đ (D)
Lấy C-D, ta có: 9 tẩy-2 thước=30000đ (E)

Vì 1 thước đắt hơn 1 tẩy 3 lần
=> 1 thước=3 tẩy (thay vào E), ta có

9 tẩy-6 tẩy=30000đ
3 tẩy=30000đ

1 tẩy=10000đ

=> 1 bút=15000đ
1 thước=30000đ

6 tháng 7 2015

bạn viết sai, phải là "eraser"

Hãy dùng từ gợi ý viết hoàn chỉnh những câu sau: 1. You / know / who invent / ballpoint pen ? ..................................................................................... 2. When / I / primary school / teacher / make / me / write / fountain-pen. ..................................................................................... 3. At / time / I / prefer / use / ballpoint pen. ...................................................................................... 4....
Đọc tiếp

Hãy dùng từ gợi ý viết hoàn chỉnh những câu sau:

1. You / know / who invent / ballpoint pen ?

.....................................................................................

2. When / I / primary school / teacher / make / me / write / fountain-pen.

.....................................................................................

3. At / time / I / prefer / use / ballpoint pen.

......................................................................................

4. Ballpoint pens / use / to / very expensive / when / first introduce / Viet Nam.

......................................................................................

5. Father / say / ballpoint pen / used / cost / some VND.

......................................................................................

6. Big / French company / make / ballpoint pens / call / Bic.

......................................................................................

7. How many / ballpoint pens / produce / world / each year?

......................................................................................

8. Ballpoint pens / use / widely / than / fountainpens.

.......................................................................................

9. It / because / they / cheaper / and / convenient.

.......................................................................................

10. It / advisable / that / children / learn / write / not use / ballpoint pens.

.......................................................................................

1
1 tháng 10 2017

Hãy dùng từ gợi ý viết hoàn chỉnh những câu sau:

1. You / know / who invent / ballpoint pen ?

do you know who invented the ballpoint pen ?

2. When / I / primary school / teacher / make / me / write / fountain-pen.

when i was in primary school, the teacher made me write with fountain-pen

3. At / time / I / prefer / use / ballpoint pen.

at that time, i prefered to use ballpoint pen

4. Ballpoint pens / use / to / very expensive / when / first introduce / Viet Nam.

Ballpoint pens used to be ver expensive when they were first introduced into Vietname

5. Father / say / ballpoint pen / used / cost / some VND.

my father said that a ball point pen used to cost some VND

6. Big / French company / make / ballpoint pens / call / Bic.

the big French company which makes ballpoint pens is called Bic

7. How many / ballpoint pens / produce / world / each year?

how many ballpoint pens are introduced in the world each year?

8. Ballpoint pens / use / widely / than / fountainpens.

Ballpoint pens are used more widely than fountainpens.

9. It / because / they / cheaper / and / convenient.

it's because they are cheaper and more convenient

10. It / advisable / that / children / learn / write / not use / ballpoint pens.

it is advisable that children who are learning to write shouldn't use ballpoint pens.

1 tháng 6 2021

the price of two apples and two oranger is

  150000-84000=66000(đong)

the price of one oranger is

   84000-66000=18000(dong)

the price of three oranger is

  18000x3=54000(dong)

the price of two apples is

  84000-54000=30000(dong)

the price of one apple is

  30000 : 2=15000(dong)

                  answer:15000 dong

1 tháng 6 2021

Dịch đề bài và cách làm bài sang Tiếng Việt nhé :3

   Đề bài:Cô Lan mua 2 quả táo và 3 quả cam với giá 84000 đồng. Cô hoa mua 4 quả táo và 5 quả cam với giá 150000 đồng. Tìm giá của 1 quả táo. 

                                        Bài giải:

     Ta thấy:

                    2 quả táo + 3 quả cam = 84 000 đồng

                   4 quả táo + 5 quả cam = 150 000 đồng.

 Ta thấy 4 chia hết cho 2.Do đó,ta có thể rút 2 quả táo => 0 quả táo và 4 quả táo => 2 quả táo.

    Khi đó,ta có:

                0 quả táo + 3 quả cam = 84 000 đồng

                2 quả táo + 5 quả cam = 150 000 đồng.

    Theo cách trên,ta có giá 1 quả cam là:

                84 000 : 3 = 28 000 (đồng)

   Gía của 5 quả cam là:

              28 000 x 5 = 140 000(đồng)

 Gía của 2 quả táo là:

           150 000 - 140 000 = 10 000(đồng)

 Giá của 1 quả táo là:

         10 000 : 2 = 5000 (đồng)

                      Đ/s:...

Cách đúng của bài này khá khó hiểu,mik làm v là để bn hiểu theo cách của mik sẽ dễ hiểu hơn nên cách lm hơi sai lệch.Nhưng đáp án mik chắc chắn 99 % là đúng.

28 tháng 2 2016

giải : 1 cái bút giá là : 3,1 x 3 = 9,3 ($)

        5 cái thước kẻ giá là : 3,1 x 5= 15,5 ($)

        3 cái bút giá là : 9,3 x 3= 27,9 ($)

        Trung bình cộng của 5 cái thước kẻ và 3 cái bút là : (15,5 + 27,9) :2 = 21,7

       Vậy trung bình cộng của 5 cái thước kẻ và 3 cái bút là 21,7

3 tháng 12 2017

ket qua ra 5

22 tháng 7 2016

4 bóng rổ và bóng đá 6 giá 460 $ .A bóng rổ là 15 $ đắt hơn một quả bóng đá.

Bao nhiêu là mỗi bóng rổ?

Bao nhiêu là mỗi bóng đá?

Tớ dịch đúng ko nếu đúng thì tích tớ nha

22 tháng 7 2016

ban dich dung nhung minh can giai ra co

29 tháng 12 2016

Đề tự dịch: Mười hai cây bút giá 24,6 đô-la. Hỏi giá của một một cây bút là bao nhiêu?

Vậy giá 1 cây bút là

     24,6 : 12 = 2,05 đô-la

29 tháng 12 2016

A dozen pens = 1 tá bút mực = 12 cái bút mực

=> 12 cái bút mực có giá 24.6 dollars.

Vậy một cái bút có giá là: 24.6 : 12 = 2.05 dollars.

15 tháng 4 2019

Đáp án là: John J. Loud invented the first ballpoint pen.

1. Tanya is older than Eric. Cliff is older than Tanya. Eric is older than Cliff. If the first two statements are true, the third statement is _______. (true/ false/ uncertain) 2. Blueberries cost more than strawberries. Blueberries cost less than raspberries. Raspberries cost more than strawberries and blueberries. If the first two statements are true, the third statement is _______. (true/ false/ uncertain) 3. All the tulips in Zoe's garden are white. All the pansies in Zoe's garden are...
Đọc tiếp

1. Tanya is older than Eric. Cliff is older than Tanya. Eric is older than Cliff. If the first two statements are true, the third statement is _______. (true/ false/ uncertain) 2. Blueberries cost more than strawberries. Blueberries cost less than raspberries. Raspberries cost more than strawberries and blueberries. If the first two statements are true, the third statement is _______. (true/ false/ uncertain) 3. All the tulips in Zoe's garden are white. All the pansies in Zoe's garden are yellow. All the flowers in Zoe's garden are either white or yellow. If the first two statements are true, the third statement is _______. (true/ false/ uncertain) 4. The temperature on Monday was lower than on Tuesday. The temperature on Wednesday was lower than on Tuesday. The temperature on Monday was higher than on Wednesday. If the first two statements are true, the third statement is _______. (true/ false/ uncertain) 5. Three pencils cost the same as two erasers. Four erasers cost the same as one ruler. Pencils are more expensive than rulers. If the first two statements are true, the third statement is _______. (true/ false/ uncertain) 6. Apartments in the Riverdale Manor cost less than apartments in The Gaslight Commons. Apartments in the Livingston Gate cost more than apartments in The Gaslight Commons. Of the three apartment buildings, the Livingston Gate costs the most. If the first two statements are true, the third statement is _______. (true/ false/ uncertain) 7. All the offices on the 9th floor have wall-to-wall carpeting. No wall-to-wall carpeting is pink. None of the offices on the 9th floor has pink wall-to-wall carpeting. If the first two statements are true, the third statement is _______. (true/ false/ uncertain)

2
14 tháng 6 2021

giúp mình với

1. Tanya is older than Eric. Cliff is older than Tanya. Eric is older than Cliff. If the first two statements are true, the third statement is _false_. (true/ false/ uncertain) 2. Blueberries cost more than strawberries. Blueberries cost less than raspberries. Raspberries cost more than strawberries and blueberries. If the first two statements are true, the third statement is true_. (true/ false/ uncertain) 3. All the tulips in Zoe's garden are white. All the pansies in Zoe's garden are yellow. All the flowers in Zoe's garden are either white or yellow. If the first two statements are true, the third statement is _uncertain_. (true/ false/ uncertain) 4. The temperature on Monday was lower than on Tuesday. The temperature on Wednesday was lower than on Tuesday. The temperature on Monday was higher than on Wednesday. If the first two statements are true, the third statement is _uncertain_. (true/ false/ uncertain) 5. Three pencils cost the same as two erasers. Four erasers cost the same as one ruler. Pencils are more expensive than rulers. If the first two statements are true, the third statement is_false_. (true/ false/ uncertain) 6. Apartments in the Riverdale Manor cost less than apartments in The Gaslight Commons. Apartments in the Livingston Gate cost more than apartments in The Gaslight Commons. Of the three apartment buildings, the Livingston Gate costs the most. If the first two statements are true, the third statement is_true_. (true/ false/ uncertain) 7. All the offices on the 9th floor have wall-to-wall carpeting. No wall-to-wall carpeting is pink. None of the offices on the 9th floor has pink wall-to-wall carpeting. If the first two statements are true, the third statement is _false_. (true/ false/ uncertain)