Question

1. Express -3/5 as a rational number with denominator

1) 20
(ii) -30
(iii) 35
(iv) -40​

Answer 1

Answer:

1) -3/5 × 4/4 = -12/20

2)-3/5 × 6/6 = -18/30 = 18/-30

3)-3/5 × 7/7 = -21/35

4)-3/5 × 8/8 = -24/40 = 24/-40

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Answer 2

Answer:

Answer:

\frac{-3}{5}=\frac{-12}{20}

5

−3

=

20

−12

Step-by-step explanation:

Given: \frac{-3}{5}

5

−3

To find: Equivalent rational no. with denominator equal to 20.

Equivalent rational no. are rational no whose simplest form are equal.

For example, \frac{-4}{8}=\frac{-6}{12}

8

−4

=

12

−6

Denominator of given rational is 5 and denominator of equivalent rational no. is 20

& we know 20 is 4th multiple of 5 .i.e., 20 = 4 × 5

then,

By multiplying & dividing the given rational no with 4 ,We get equivalent rational with denominator 20

\implies\frac{-3}{5}\times\frac{4}{4}=\frac{-3\times4}{5\times4}=\frac{-12}{20}⟹

5

−3

×

4

4

=

5×4

−3×4

=

20

−12

Therefore, \frac{-3}{5}=\frac{-12}{20}

5

−3

=

20

−12

Step-by-step explanation:

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