246+244+242+240+238+236+234+232+230+228+226+224+222+220+218+216+214+212+210+208=?
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Tính nhanh:
248-242+240-234+232-226+...+216-210
\(A=248-242+240-234+232-226+...+216-210\)
\(=4+4+4+...4\)
Số số 4 là \(\left(248-216\right):8+1=5\)
\(\Rightarrow A=5.4=20\)
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tìm số tròn trăm x biết 202<x<614
x =204 ,206 , 208, 210, 212 , 214 , 216 ,218
cho dãy số 202, 204, 206, 208, 210, 212, 214, 216, 218. Trong dãy số trên số chữ số 8 có tất cả:
211. She was too….to tell her teacher about the stupid mistakes. (shame)
212. This photo has just been….(large)
213. He always fells….in class because of his laziness. ( sleep)
214. She failed the driving test because she didn’t follow the guidance of the driving….(instruct)
215. He…..agreed to my suggestion. (ready)
216. The island is…..only by boat. (access)
217. They spent all their money and made no…….for their future. (provide)
218. When foreigners ask him, he answers in English……(a...
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211. She was too….to tell her teacher about the stupid mistakes. (shame)
212. This photo has just been….(large)
213. He always fells….in class because of his laziness. ( sleep)
214. She failed the driving test because she didn’t follow the guidance of the driving….(instruct)
215. He…..agreed to my suggestion. (ready)
216. The island is…..only by boat. (access)
217. They spent all their money and made no…….for their future. (provide)
218. When foreigners ask him, he answers in English……(automatic)
219. What he has explained about that problem is……(reason)
220. You must always tell the…..(truth)
221. The girl looked….for a moment and then answered. (think)
222. The country’s…..resources include forests, coal and oil. (nature)
223. The agency offers practical….to people starting their own business. (guide)
224. There is a….to overcome the problems. (determined)
225. We were….that she would be angry.(fear)
226. These closures will mean….for about 500 workers. (employ)
227. The house was….with people. (crowd)
228. I’m….sorry for the delay. (extreme)
229. Because of his love for teaching, David would….his teaching career. (continuous)
230. It is often useful to make a…..between two things. (compare)
231. He was…..for the job by a committee. (selection)
232. The smoke that comes from a lit cigarette contains many different…..chemicals. (poison)
233. ……compounds are often used for fertilizers. (chemist)
234. Many….developed countries spend much money preventing environmental pollution. (industry)
235. Our atmosphere is becoming more and more….(contaminate)
236. It is….to drive on the left in Vietnam. (legal)
237. Can you….what this word mean? (explanation)
238. American women are used to being…..(independence)
239. I will come to her party because I accept the….(invite)
240. You should spend your money….(economy)
211. She was too ashamed.to tell her teacher about the stupid mistakes. (shame)
212. This photo has just been…enlarged .(large)
213. He always fells…sleepy .in class because of his laziness. ( sleep)
214. She failed the driving test because she didn’t follow the guidance of the driving…instruction.(instruct)
215. He…readily..agreed to my suggestion. (ready)
216. The island is…accessible..only by boat. (access)
217. They spent all their money and made no…providence….for their future. (provide)
218. When foreigners ask him, he answers in English…automatically…(automatic)
219. What he has explained about that problem is…reasonable…(reason)
220. You must always tell the…truth..(truth)
221. The girl looked…thoughtless .for a moment and then answered. (think)
222. The country’s…natural..resources include forests, coal and oil. (nature)
223. The agency offers practical…guidelines .to people starting their own business. (guide)
224. There is a…determination.to overcome the problems. (determined)
225. We were…fearful .that she would be angry.(fear)
226. These closures will mean…unemployed .for about 500 workers. (employ)
227. The house was…crowded.with people. (crowd)
228. I’m extremely….sorry for the delay. (extreme)
229. Because of his love for teaching, David would…continue .his teaching career. (continuous)
230. It is often useful to make a…comparion..between two things. (compare)
231. He was…selected ..for the job by a committee. (selection)
232. The smoke that comes from a lit cigarette contains many different…poisonous..chemicals. (poison)
233. …chemistry…compounds are often used for fertilizers. (chemist)
234. Many…industrial .developed countries spend much money preventing environmental pollution. (industry)
235. Our atmosphere is becoming more and more…contaminated.(contaminate)
236. It is illegal….to drive on the left in Vietnam. (legal)
237. Can you…explain.what this word mean? (explanation)
238. American women are used to being…independent..(independence)
239. I will come to her party because I accept the…invitation.(invite)
240. You should spend your money…economically.(economy)
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Cho dãy số: 202, 204, 206, 208,210, 212, 214, 216, 218. Số thứ năm trong dãy số là
A. 204
B. 206
C. 210
D. 214
SGK Toán 3 tập 1- Bộ sách Cánh diều - Trang 36
27 tháng 3 2023 lúc 18:52
Tính nhẩm:
18:2
10:2
4:2
14:2
20:2
2:2
30:5
10:5
25:5
50:5
35:5
45:5
18 : 2 = 9 10 : 2 = 5 4 : 2 = 2 | 14 : 2 = 7 20 : 2 = 10 2 : 2 = 1 | 30 : 5 = 6 10 : 2 = 5 25 : 5 = 5 | 50 : 5 = 10 35 : 5 = 7 45 : 5 = 9 |
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Viết kết quả phép tính sau dưới dạng một lũy thừa :
c) 2 26 : 2 10 : 2 18 : 2 16
c) 2 26 : 2 10 : 2 18 : 2 16 = 2 16 : 2 2 = 2 14
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Cho dãy số: 202, 204, 206, 208,210, 212, 214, 216, 218. Trong dãy số trên có bao nhiêu chữ số 8
A. 2
B. 3
C. 4
D. 5
tìm chữ số tận cùng của :
21121 + 21222 + 21323 + 21424 + 21525 + 21626 + 21727+ 21828 + 21929 + 22030