Một chuỗi 2.1m được cắt thành 6 phần bằng nhau. Chiều dài của mỗi phần bằng ....cm
ta có 2,1m=210cm
210:6=35(cm)
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A string of 2.1m was cut into 6 equal parts. What's the length of each part in cm?
A group of students, including boys and girls are very close, anytwo of you in the group are close friends. The guys say to each other that we each have some guys with some female friends. Andthe girls say to each other that we each have twice the number ofmen you girls. (Note: Some friends of each person included in thegroup). That group of students asked how many of you men, how many girls?
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A group of students, including boys and girls are very close, anytwo of you in the group are close friends. The guys say to each other that we each have some guys with some female friends. Andthe girls say to each other that we each have twice the number ofmen you girls. (Note: Some friends of each person included in thegroup). That group of students asked how many of you men, how many girls?
write the present continuous form of the verb in brackets to complete each sentence, as
i.............(sêe) Rachel on Saturday.
jane and i......................( go out) tonight.
Martha.........................(swim) this afternoon.
We .....................(have) a halloween party on Saturday.
I.........................(take) Sphie out for a birthday dinner tonight.
Chia động từ1. When I got home I found that water ..... down the kitchen walls.(Run)2. After he ...... his English course, he went to England to continue his study. (finish)3. How .......since we ....... collegeA. are you - leftB.were you - leftC. have you been - have leftD. have you been - left4. I .... much of you lately. We ....... three months ago.A. havent seen-last meet B. didnt see-met C. havent seen - have meet D. didnt see - have met5. The Chinese ...... spaghetti dishes for a long tim...
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Chia động từ
1. When I got home I found that water ..... down the kitchen walls.(Run)
2. After he ...... his English course, he went to England to continue his study. (finish)
3. How .......since we ....... college
A. are you - left
B.were you - left
C. have you been - have left
D. have you been - left
4. I .... much of you lately. We ....... three months ago.
A. haven't seen-last meet B. didn't see-met C. haven't seen - have meet D. didn't see - have met
5. The Chinese ...... spaghetti dishes for a long time before Marco Polo ..... back to Italy
A. Made-brought B. Have made-brought C. made - havd brought D. had been making-brought
6. When I arrived at the meeting the first speaker ..... speaking and the audience ........
A. just finished-were clapping
B. had just finished-had clapped
C. had just finished-were clapping
D. just finished-had clapped
7. He ..... his job last month and then he.........out of work
A. lost-was B. was lost-had been
C. has lost-was D. lost-have been
8. In the last hundred years, travelling ...... much easier and more comfortable ( become )
9. In the 19th century, iit ...... two or three months to across North America by covered wagon.
( take)
10. In the past, the trip ...... very rough and often dangerous , but things ..... A great deal in the last hundred and fifty years.
A. was-have changed
B. is-change
C. had been-will change
D. has been -changed
Given K is the midpoint of AB
If KA = 2x + 1 (cm)
BK = x + 5 (cm ) then AB = ...... (cm )
Given G is the midpont of HK. If KH = 24 cm then GK = cm
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Exer 1: There is a division with the quotient is 6 and the remainder is 3. The sum of dividend, divisor and remainder are 195. Find the dividend are divisor.
Exer 2: Prove that: Amoney three consecutive natural numbers, there is one only one the number which divisibles by 3.
Exer 3: Given natural number, n overline{1ab1}. Let m be the natural number which is written the opposite respectively of n. Prove that the different of n and m divisibles by 90.
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Exer 1: There is a division with the quotient is 6 and the remainder is 3. The sum of dividend, divisor and remainder are 195. Find the dividend are divisor.
Exer 2: Prove that: Amoney three consecutive natural numbers, there is one only one the number which divisibles by 3.
Exer 3: Given natural number, n = \(\overline{1ab1}\). Let m be the natural number which is written the opposite respectively of n. Prove that the different of n and m divisibles by 90.
Cho hai số nguyên a và b (b ≠ 0). Chứng tỏ rằng các cặp phân số sau đây luôn bằng nhau:
a) và b) và .
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Cho hai số nguyên a và b (b ≠ 0). Chứng tỏ rằng các cặp phân số sau đây luôn bằng nhau:
a) và
b)
và
.
Viết các tập hợp sau bằng cách liệt kê các phần tử:a) A {x ∈ N 12 x 16};b) B { x∈ N* x 5};c) C { x ∈ N 13 ≤ x ≤ 15}
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Viết các tập hợp sau bằng cách liệt kê các phần tử:
a) A = {x ∈ N 12 < x < 16};
b) B = { x∈ N* x < 5};
c) C = { x ∈ N 13 ≤ x ≤ 15}