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Class 8 RS Aggarwal Math Solutions

Contents

1. Rational numbers Ex-1A,C,D,E,F,G

2. Exponent and radicals Ex-2A

 

1.RATIONAL NUMBERS

 

 

 

 

 

 

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EXERCISE-1E DIVISION

 

Q1. Simplify:

 

[i] [ii] .

 

[iii]

 

Q2. [i] =>

 

. Hence it is True.

 

[ii] -9 (-9) => -9 x = => .

Hence it is False.

 

Q4. Let the two rational number = .

ATQ, and one no. is = -12. Then,

 

= .

 

 

Q5. Let the two rational number = . ATQ,

 

Also, => = = .

 

Q6. => Y = => Y = .

 

Q7. x y = => y = = .

 

Q8. =>

 

  => y = .

 

Q9. and

 

ATQ, = .

 

Q10. . diff.,

 

ATQ, = .

 

Q11. [i] = = => => = .

[ii] y x => y = .

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EXERCISE 1F

 

Q1. Find a rational number between .

 

= = = .

 

Q2. Find a rational number between 2 and 3.

 

Required number = (2 + 3) =

 

Q3. Find a rational number between .

Required number = = = x = .

 

Q4. Find a two rational number between-3 and -2.

 

we may write -3 = and -2 = .

Rational number between -3 and -2 are .

OR

 

 

(-3 -2) = -3 < <-2 Rational no. between -3 and

 

= = = .

 

Rational no. between and -2.

 

.

 

Hence required no. are <-2.

 

Q5. Find three rational number between 4 and 5.

 

we may write 4 = and 5 = .

Rational number between 4 and 5 are .

 

Q6. Find three rational numbers between .

 

LCM of 3 and4 is 12. Now, and .

 

Rational no. lying between are .

 

 

 

 

 

 

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