-4/7 , 8/-14 , -12/21 are _________rational numbers
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Answer:
Question 1:
Express
-3
5
as a rational number with denominator
(i) 20
(ii) −30
(iii) 35
(iv) −40
ANSWER:
If
a
b
is a fraction and m is a non-zero integer, then
a
b
=
a×m
b×m
.
Now,
(i)
-3
5
=
-3×4
5×4
=
-12
20
(ii)
-3
5
=
-3×-6
5×-6
=
18
-30
(iii)
-3
5
=
-3×7
5×7
=
-21
35
(iv)
-3
5
=
-3×-8
5×-8
=
24
-40
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