Exercise 1A
Question 1
Fill in the blanks :
(i) $\frac{7}{-8}$, expressed as a rational number with denominater 24=
(ii) $\frac{-4}{7} \ldots \ldots \ldots \frac{4}{-11} \quad(<,>,=)$
(iii) The absolute value of $\frac{-16}{-19}=$
(iv) The rational numbers whose absolute value is $\frac{11}{13}$ are
(v) The rational number which is neither positive nor negative is
Sol :
Question 2
Answer True (T) or False (F):
(i) Every rational number is a whole number.
(ii) 0 is the smallest rational number.
(iii) Every fractional number is a rational number.
(iv) $\frac{4}{0}$ is a rational number.
(v) |x|=-x if x<0
Sol :
Question 3
Write four rational numbers equivalent to each of the following rational numbers:
(i) $\frac{2}{5}$
(ii) $\frac{-5}{9}$
(iii) $\frac{8}{-11}$
(iv) $\frac{-12}{13}$
Sol :
Question 4
Which of the symbols <,= or > should replace the blank space ?
(i) $\frac{8}{7}, \cdots \frac{12}{9}$
(ii) $\frac{-2}{3} \ldots \ldots \frac{4}{-7}$
(iii) $\frac{13}{-15}, \ldots \frac{10}{-11}$
(iv) $0 \ldots . \frac{-3}{-8}$
Sol :
Question 5
Write the absolute value of:
(i) $\frac{5}{8}$
(ii) $\frac{-7}{10}$
(iii) 0
(iv) $\frac{11}{-12}$
Sol :
Question 6
$-\frac{28}{84}$ expressed as a rational number with numerator 4 is
(a) $\frac{4}{12}$
(b) $\frac{4}{7}$
(c) $\frac{4}{-7}$
(d) $\frac{4}{-12}$
Sol :
Question 7
Which of the following set of rational numbers is arranged in ascending order ?
(a) $-\frac{1}{2}, \frac{-3}{7}, \frac{-5}{14}, \frac{-25}{28}$
(b) $-\frac{25}{28},-\frac{1}{2},-\frac{3}{7},-\frac{5}{14}$
(c) $\frac{-25}{28},\frac{-5}{14},\frac{-3}{7},\frac{-1}{2}$(d) $-\frac{5}{14},-\frac{25}{28},-\frac{3}{7},-\frac{1}{2}$
Sol :
High Order Thinking Skills
Question 8
Find the absolute value of :
$-1 \div \frac{-1}{5} \div \frac{1}{-5} \div \frac{-1}{-5}$
Sol :
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