Тест по предмету «Алгебра» на тему «Арифметические действия с рациональными числами»

1. Вычислите: \(-\frac{3}{4}+\frac{5}{6}\).

   A) \(\frac{1}{12}\)
   B) \(-\frac{1}{12}\)
   C) \(\frac{19}{12}\)
   D) \(-\frac{19}{12}\)

2. Вычислите: \((-2{,}4)\cdot1{,}5\).

   A) \(-3{,}9\)
   B) \(-3{,}6\)
   C) \(3{,}6\)
   D) \(1{,}6\)

3. Вычислите: \(\frac{7}{8}:\left(-\frac{14}{15}\right)\).

   A) \(-\frac{15}{16}\)
   B) \(-\frac{16}{15}\)
   C) \(\frac{15}{16}\)
   D) \(\frac{16}{15}\)

4. Вычислите: \(-2\frac{1}{3}-\left(-1\frac{5}{6}\right)\).

   A) \(-\frac{3}{2}\)
   B) \(\frac{1}{2}\)
   C) \(-\frac{1}{2}\)
   D) \(\frac{3}{2}\)

5. Вычислите: \(3-\left[2-\left(-\frac{5}{4}\right)\right]\).

   A) \(-\frac{1}{4}\)
   B) \(\frac{1}{4}\)
   C) \(-\frac{9}{4}\)
   D) \(\frac{9}{4}\)

6. Вычислите: \(\left(-\frac{5}{6}+\frac{1}{3}\right)\cdot\left(-\frac{9}{4}\right)\).

   A) \(-\frac{9}{8}\)
   B) \(\frac{9}{8}\)
   C) \(\frac{3}{8}\)
   D) \(\frac{15}{8}\)

7. Вычислите: \(0{,}75-1\frac{1}{5}\).

   A) \(-\frac{9}{20}\)
   B) \(\frac{9}{20}\)
   C) \(-\frac{3}{20}\)
   D) \(\frac{39}{20}\)

8. Вычислите: \(\left(-\frac{3}{5}\right):\frac{9}{10}+\frac{1}{3}\).

   A) \(-\frac{1}{3}\)
   B) \(\frac{1}{3}\)
   C) \(-\frac{5}{3}\)
   D) \(\frac{5}{3}\)

9. Вычислите: \(\dfrac{-1{,}2+\frac{3}{5}}{-\frac{3}{4}}\).

   A) \(-\frac{4}{5}\)
   B) \(\frac{4}{5}\)
   C) \(\frac{5}{4}\)
   D) \(-\frac{5}{4}\)

10. Вычислите: \(\frac{2}{3}-0{,}4\cdot\left(-\frac{5}{2}\right)\).

    A) \(-\frac{5}{3}\)
    B) \(\frac{1}{3}\)
    C) \(\frac{5}{3}\)
    D) \(\frac{7}{3}\)

Ответы

1 — A (\(\frac{1}{12}\))
2 — B (\(-3{,}6\))
3 — A (\(-\frac{15}{16}\))
4 — C (\(-\frac{1}{2}\))
5 — A (\(-\frac{1}{4}\))
6 — B (\(\frac{9}{8}\))
7 — A (\(-\frac{9}{20}\))
8 — A (\(-\frac{1}{3}\))
9 — B (\(\frac{4}{5}\))
10 — C (\(\frac{5}{3}\))