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(3/7)*(1/10)-(3/7)*2/5+3/7*1

solve the above-using propeties of rational numbers..
pls give the ans fast..
it's very urgent...
pls don't give wrong ans...

1 Answer

7 votes

Answer:


(- 39)/(70)

Explanation:

{
(3)/(7) x
(1)/(10)\\} - {
(3)/(7) }x
(2)/(5) +
(3)/(7) x 1

We follow the BODMAS rule

=
(3)/(70) -
(3)/(7) x
(2)/(5) +
(3)/(7) x 1

=
(3)/(70) -
(3)/(7\\) x
(2)/(5) +
(3)/(7) x 1

=
(3)/(70) -
(3)/(7\\) x
(2)/(5) +
(3)/(7)

=
(3)/(70) -
(6)/(35) +
(3)/(7)

=
(3)/(70) -
(6)/(35) +
(3*5)/(7*5) LCM= 35

=
(3)/(70) -
(6 + 15)/(35)

=
(3)/(70) -
(21)/(35)

=
(3)/(70) -
(21*2)/(35*2) LCM= 70

=
(3 - 42)/(70)

=
(- 39)/(70)

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