Mathematics

Fluidité · Pack A

8.1 Fractions review

Répondez à chaque question. Montrez les calculs si nécessaire.

Bronze
  1. Convert the improper fraction $\dfrac{17}{5}$ to a mixed numeral.

  2. Convert the mixed numeral $4\tfrac{2}{3}$ to an improper fraction.

  3. Simplify the fraction $\dfrac{18}{24}$ to its simplest form.

  4. Write $\dfrac{3}{4}$ as an equivalent fraction with denominator 20.

  5. Calculate $\dfrac{2}{7} + \dfrac{3}{7}$ and simplify if possible.

  6. Calculate $\dfrac{1}{3} + \dfrac{1}{4}$. Give your answer in simplest form.

  7. Calculate $\dfrac{2}{3} \times \dfrac{3}{4}$. Give your answer in simplest form.

  8. Calculate $\dfrac{3}{4} \div \dfrac{1}{2}$. Give your answer in simplest form.

  9. Write 35% as (a) a decimal and (b) a fraction in its simplest form.

  10. Write $\dfrac{3}{4}$ as a decimal and as a percentage.

Silver
  1. Calculate $\dfrac{5}{6} - \dfrac{1}{4}$. Give your answer in simplest form.

  2. Calculate $2\tfrac{1}{3} + 1\tfrac{1}{6}$.

  3. Find $\dfrac{3}{5}$ of 600 g.

  4. Calculate $\dfrac{3}{8} \times 12$ where $n$ is a whole number. Give the answer in simplest form.

  5. Calculate $\dfrac{4}{5} \div 8$.

  6. Order from smallest to largest: $\dfrac{2}{3}$, $\dfrac{5}{8}$, $\dfrac{7}{12}$.

  7. Convert the recurring decimal $0.\overline{3}$ to a fraction in its simplest form.

  8. Calculate $\dfrac{1}{2} + \dfrac{1}{3} - \dfrac{1}{6}$.

  9. Write 0.45 as a fraction in its simplest form.

  10. Calculate $2\tfrac{1}{4} \times \dfrac{4}{5}$.

Gold
  1. A pizza is cut into 8 equal slices. Tomás eats $\tfrac{3}{8}$, and his sister eats $\tfrac{1}{4}$ of the whole pizza. What fraction of the pizza is left?

  2. A bottle holds 600 ml. Joëlle drinks $\tfrac{2}{5}$ of it on the way to school and $\tfrac{1}{4}$ of the remainder at break. How many ml are left?

  3. Find $60\%$ of $\dfrac{3}{4}$ of 200 chf.

  4. Calculate $\dfrac{2}{3} \div \dfrac{4}{9} + \dfrac{1}{2}$.

  5. In a school survey, $\tfrac{2}{5}$ of the students chose Maths and 30% chose English. The rest chose Science. What fraction chose Science? Give your answer as a fraction in simplest form.

  6. Calculate $5\tfrac{1}{4} - 2\tfrac{1}{2}$.

  7. Order from smallest to largest: 0.6, $\tfrac{5}{8}$, 62%.

  8. A recipe for 8 pancakes uses $\tfrac{3}{4}$ cup of flour. How much flour is needed for 12 pancakes? Give the answer as a mixed numeral if possible.

  9. Calculate $\left(\dfrac{1}{2} + \dfrac{1}{3}\right) \times \dfrac{6}{5}$.

  10. Write 12.5% as a fraction in its simplest form.

Platinum
  1. Calculate $\dfrac{\tfrac{2}{3} + \tfrac{1}{4}}{\tfrac{5}{6} - \tfrac{1}{3}}$.

  2. A jug is $\tfrac{2}{3}$ full of juice. After pouring out 600 ml, it is $\tfrac{1}{4}$ full. How many ml does the jug hold when full?

  3. Convert the recurring decimal $0.\overline{27}$ to a fraction in its simplest form.

  4. A test has 60 questions. Léa answered $\tfrac{3}{5}$ of them correctly. Of the remainder, $\tfrac{1}{4}$ were left blank and the rest were wrong. How many were wrong?

  5. Show that $0.\overline{9} = 1$ by an algebraic argument.

  6. A pile of marbles is shared among three children. Anna takes $\tfrac{1}{4}$, Ben takes $\tfrac{2}{5}$ of what is left, and Carla takes the remaining 18. How many marbles were in the pile?

  7. Two fractions $\tfrac{a}{b}$ and $\tfrac{c}{d}$ are equivalent if $ad = bc$. Determine whether $\tfrac{12}{18}$ and $\tfrac{20}{30}$ are equivalent, and explain.

  8. Find a fraction $\tfrac{p}{q}$ between $\tfrac{3}{8}$ and $\tfrac{1}{2}$ with a denominator less than 10.

  9. A fraction $\tfrac{n}{n+5}$ simplifies to $\tfrac{3}{4}$. Find $n$.

  10. Show that the sum $1 + \tfrac{1}{2} + \tfrac{1}{4} + \tfrac{1}{8}$ can be written as a single improper fraction, and explain whether the pattern $1 + \tfrac{1}{2} + \tfrac{1}{4} + \ldots + \tfrac{1}{2^n}$ ever reaches 2.