CBSE Class 7 Mathematics Rational Numbers Assignment Set 05

Fill the gaps:

Question. Any rational number can be expressed in the form of ____________.
Answer: \( \frac{p}{q}, q \neq 0 \)

Question. Every integer is a ____________ number.
Answer: Rational

Question. Every rational number \( \frac{p}{q} \) is positive if both \( p \) and \( q \) are ____________ or ____________.
Answer: positive, negative

Question. Every fraction is a ____________ number.
Answer: Rational

Question. If \( \frac{p}{q} = \frac{r}{s} \), then ____________ = ____________.
Answer: \( ps = qr \)

Question. \( \frac{-9}{5} = \frac{\text{_______}}{20} = \frac{27}{\text{_______}} \)
Answer: \( -36, -15 \)

Question. The additive inverse of \( \left(-\frac{3}{5}\right) \) is ____________.
Answer: \( \frac{3}{5} \)

Question. The multiplicative inverse of \( \frac{3}{4} \) is ____________.
Answer: \( \frac{4}{3} \)

Question. The product of two rational numbers is \( 1 \). If one of them is \( \frac{7}{8} \), the other is ____________.
Answer: \( \frac{8}{7} \)

Question. ____________ has no reciprocal.
Answer: Zero

Question. There is ____________ rational number which when multiplied with \( 0 \) gives \( 1 \).
Answer: No

Question. The negative of \( \frac{-3}{-4} \) is ____________.
Answer: \( -\frac{3}{4} \)

Question. If \( \frac{x}{3} = \frac{7}{4} \), then \( x = \) ____________.
Answer: \( \frac{21}{4} \)

Question. \( -\frac{13}{5} \) lies on the number line to the ____________ of \( 0 \).
Answer: Left

Question. \( \frac{2}{3} + \text{_______} = \frac{4}{5} \)
Answer: \( \frac{2}{15} \)