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16 tháng 2 2016

Phép tính sai 2 x 3 + 6 x 4 = 42 có thể sửa thành đúng bằng cách tăng 2 đơn vị cho 1 trong các số của phép tính.Số đó nên là số mấy ?

4 nha ! Phép tính chính xác là 2 x 3 + 6 x 6 = 42

16 tháng 2 2016

Số 2 đầu tiên trong phép tính tăng lên thành số 6 sẽ có đáp án đúng. 

Duyệt nhé! 

29 tháng 12 2015

à bn ơi thiếu rồi phải có kq của nó. 

phép tính của nó là: 2x3+6x4=42(hình như là dzậy hôm thi mik đúng bài này)

tăng số 4 lên 2 đv bn nha, có j sai cho mik xin lỗi, đúng thì tick cho mik

 

 

29 tháng 12 2015

Việc tính toán không chính xác : 2 x 3 + 6 x 4 có thể được thực hiện chính xác bằng cách tăng một trong những con số bằng 2. Mà số nó nên được?

24 tháng 1 2016

sai hoàn toàn.nhân và chia trước, cộng trừ sau

Read the text below and look carefully at each line. Some of the lines are correct, and some have a word which should not be there. If a line is correct, put a tick (P) by the number on your answer sheet. If a line has a word which should not be there, write the word on your answer sheet. There are two examples at the beginning.The authorities of Bangladesh are doing their best for the victims of the floods which have been covered  many of low-lying coastal villages. The floods were caused by a...
Đọc tiếp

Read the text below and look carefully at each line. Some of the lines are correct, and some have a word which should not be there. If a line is correct, put a tick (P) by the number on your answer sheet. If a line has a word which should not be there, write the word on your answer sheet. There are two examples at the beginning.

The authorities of Bangladesh are doing their best for the victims of the floods which have been covered  many of low-lying coastal villages. The floods were caused by a combination of very high spring tides and too heavy rainfall in the mountains, which, according to government sources, could not to have been predicted. The government has called in the army to the affected areas, and they are handing out a food to the people who could have managed to get away from the flood by moving to more higher ground. The 

authorities  estimate that there are must be several thousand people who are in need of urgent medical attention .

0
IV. Read the text below and look carefully at each line. Some of the lines are correct, and some have a word which should not be there. If a line is correct, put a tick () by the number on your answer sheet. If a line has a word which should not be there, write the word on your answer sheet. There are two examples at the beginning.0 The authorities of Bangladesh are doing their best for 0. ___________00 the victims of the floods which have been covered 00. ____been____1 many of low-lying...
Đọc tiếp

IV. Read the text below and look carefully at each line. Some of the lines are correct, and some have a word which should not be there. If a line is correct, put a tick () by the number on your answer sheet. If a line has a word which should not be there, write the word on your answer sheet. There are two examples at the beginning.

0 The authorities of Bangladesh are doing their best for 0. ___________

00 the victims of the floods which have been covered 00. ____been____

1 many of low-lying coastal villages. The floods were 1. _____________

2 caused by a combination of very high spring tides and 2. _____________

3 too heavy rainfall in the mountains, which, according to 3. _____________

4 government sources, could not to have been predicted. 4. _____________

5 The government has called in the army to the affected 5. _____________

6 areas, and they are handing out a food to the people 6. _____________

7 who could have managed to get away from the flood 7. _____________

8 by moving to more higher ground. The authorities 8. _____________

9 estimate that there are must be several thousand 9. _____________

10 people who are in need of urgent medical attention. 10. ____________

0
Read the text below and look carefully at each line. Some of the lines are correct, and some have a word which should not be there. If a line is correct, put a tick () by the number on your answer sheet. If a line has a word which should not be there, write the word on your answer sheet. There are two examples at the beginning.0 The authorities of Bangladesh are doing their best for 0. ___________00 the victims of the floods which have been covered 00. ____been____1 many of low-lying...
Đọc tiếp

Read the text below and look carefully at each line. Some of the lines are correct, and some have a word 
which should not be there. If a line is correct, put a tick () by the number on your answer sheet. If a line 
has a word which should not be there, write the word on your answer sheet. There are two examples at the 
beginning.
0 The authorities of Bangladesh are doing their best for 0. ___________
00 the victims of the floods which have been covered 00. ____been____
1 many of low-lying coastal villages. The floods were 1. _____________
2 caused by a combination of very high spring tides and 2. _____________
3 too heavy rainfall in the mountains, which, according to 3. _____________
4 government sources, could not to have been predicted. 4. _____________
5 The government has called in the army to the affected 5. _____________
6 areas, and they are handing out a food to the people 6. _____________
7 who could have managed to get away from the flood 7. _____________
8 by moving to more higher ground. The authorities 8. _____________
Page 3 of 4
9 estimate that there are must be several thousand 9. _____________
10 people who are in need of urgent medical attention. 10.

0
23 tháng 2 2017

Exer 1:

Trả lời:

The sum of dividend and divisor are:

195 - 3 = 192

Because the quotient is 6.

The divisor is:

(192-3) : (6+1) = 27

The dividend is:

192 - 27 = 165

Exer 2:

Trả lời:

Let three unknow numbers be: n, n + 1, n + 2.

Because n has three forms: 3k, 3k + 1, 3k + 2.

+) If n

23 tháng 2 2017

Xin lỗi, mình vẫn chưa viết xong, rồi mình viết tiếp đây:

+) If n = 3k then there is only n divisibles by 3.

+) If n = 3k + 1 then there is only n + 2 divisibles by 3.

+) If n = 3k + 2 then there is only n + 1 divisibles by 3.

Thus, amoney three consecutive natural numbers, there is one only one the number which divisibles by 3.

Exer 3:

Trả lời:

When we written the opposite respectively of n, we obtain \(\overline{1ba1}\).

We have:

\(\overline{1ab1}\) + \(\overline{1ba1}\) = (1000 + 100a + 10b + 1) - (1000 + 100b + 10a + 1)

= 90a - 90b

= 90(a - b)\(⋮\) 90

Thus, the difference of n and m which divisibles by 90.