Question

Rudra Public School
Class-8th
Sub-Maths
Date -26-05-2020

Revision worksheet for P.T 1

Multiple choice questions :-

Q.1 Tick(✔) the correct answers.

(i) The rational number that does not have a reciprocal.

(a) 0 (b) 1 (c) 2 (d) 4

(ii) The rational numbers that are equal to their reciprocals.

(a) 1 and -1 (b) 2 and 3
(c) -2 and 3 (d) 6 and 7

(iii) The rational number that is equal to its negative.

(a) 0 (b) 1 (c) 2 (d) 3

(iv)Multiplicative inverse of 5/18 is -

(a) 9/5 (b) 18/5 (c) 7/5 (d) -5/18

(v) Additive inverse of 2/5 is -

(a) 3/5 (b) 2/5 (c) -2/5 (d) 5/2

(vi) Find the value of t, if t/5 = 10

(a) t= 5 (b) t= 50 (c) t= 15 (d) t= 20

(vii) Reciprocal of 1/p is -

(a) p/2 (b) -p (c) p (d) 1/p

Q.2 : Fill in the blanks.

(i) Zero has __________ reciprocal.

(ii) The numbers __________ and __________ are their own reciprocals

(iii) The reciprocal of - 5 is __________.

(iv) The product of two rational numbers is always a __________.

(v) The reciprocal of a positive rational number is __________.

3.Write true/ false for the following questions.

(i) 1/5 - 1/10 = 5/30 - 2/30

(ii) 2/5 = 14/30 ÷ 7/6

(iii) 5 = 5/1

(iv) 3/2 + 5/2 = 8/3 + 4/3

(v) p/q × r/s = pr/qs

Long answer type questions.

Q.4. Find ten rational numbers between 3/5 and 3/4

Q.5. Find five rational numbers between

(i) 2/3 and 4/5

(ii) 3/2 and 5/3

solve this​

Answer 1

Answer:

1

(i) a

(ii)a

(III)a

(iv) b

(v)c

(vi)b

(vii)c

2

(I)no

(ii)1 and -1

(III)-1/5

(iv) rational number

(v) rational number

3

(I) true

(ii) true

(iii) true

(iv)false

(v) false

4. 36/60< 37/60<38/60< 38/60<39/60<40/60<41/60<42/60<43/60<44/60

5.(I)61/90,62/90,63/90,64/90,65/90

(ii) 9/6,8/6,0/6,-5/6,-3/6