Câu hỏi trắc nghiệm (10 câu):
-
- A. \(\frac{5}{{39}}\)
- B. \(\frac{7}{{25}}\)
- C. \(\frac{13}{{50}}\)
- D. \(\frac{17}{{40}}\)
-
- A. \(\frac{{123}}{{1000}}\)
- B. \(\frac{{123}}{{100}}\)
- C. \(\frac{{41}}{{333}}\)
- D. \(\frac{{123}}{{999}}\)
-
- A. 513
- B. 29
- C. 13
- D. 57
-
- A. \(\frac{{26}}{{99}}\)
- B. \(\frac{{990}}{{1219}}\)
- C. \(\frac{{1193}}{{990}}\)
- D. \(\frac{{1219}}{{260}}\)
-
- A. \(\frac{4}{{1815}}\)
- B. \(\frac{1}{{165}}\)
- C. \(\frac{7}{{60}}\)
- D. \(\frac{6}{7}\)
-
Câu 6:
Tìm x biết: \(0,(37).x = 1\)
- A. \(x = \frac{{99}}{{37}}\)
- B. \(x = \frac{9}{{37}}\)
- C. \(x = \frac{{37}}{{99}}\)
- D. \(x = \frac{{37}}{{100}}\)
-
- A. 1
- B. 2
- C. 3
- D. 4
-
Câu 8:
Tìm x biết: 2,(45):x = 0,5
- A. \( x = \frac{{11}}{{54}}\)
- B. \( x = \frac{{54}}{{11}}\)
- C. \( x = \frac{{27}}{{22}}\)
- D. \( x = \frac{{49}}{{10}}\)
-
- A. 69,28
- B. 69,29
- C. 69,30
- D. 69,284
-
- A. 6,674
- B. 6,68
- C. 6,63
- D. 6,67
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