Rational numbers

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

1. is the additive inverse of 5
2. is the additive inverse of

\frac{8}{11}

\frac{-12}{17}

\frac{9}{17}

=
4.

\frac{200}{225}

- (

\frac{-180}{225}

) =
5. (

-4 \frac{5}{22}

) - (

-2 \frac{6}{11}

) =
6.

\frac{-5}{8}

x 7 =
7.

\frac{7}{-8}

\frac{-3}{4}

=
8. The collection of rational numbers is under addition and multiplication.
9. Addition and multiplication are and for rational numbers.
10. For any rational number a there exists unique identity elements and such that + a = a and x a = a

Rational numbers

Gap-fill exercise