Question

Find 20 rational no. Between the additive inverse of the sum of 2/5 and 1/3 and the product of 6/7 and 21/24

Answer 1

(i) 0 is the rational number that does not have a reciprocal. (ii) 1 and -1 are the rational numbers that are equal to their reciprocals. (iii) 0 is the rational number that is equal to its negative.

Question-11 :-  Fill in the blanks. 
(i) Zero has ________ reciprocal. 
(ii) The numbers ________ and ________ are their own reciprocals. 
(iii) The reciprocal of –5 is ________. 
(iv) Reciprocal of 1/x, where x ≠ 0 is ________. 
(v) The product of two rational numbers is always a _______. 
(vi) The reciprocal of a positive rational number is ________.

Solution :- 
(i) Zero has no reciprocal. (ii) The numbers 1 and -1 are their own reciprocals (iii) The reciprocal of -5 is -1/5. (iv) Reciprocal of 1/x, where x ≠ 0 is x. (v) The product of two rational numbers is always a rational numbers. (vi) The reciprocal of a positive rational number is positive rational numbers.

Ncert Solution at 20:14 No comments:

Share

 

Rational Numbers -- EXERCISE-1.1 example Continue.....


Question-7 :-  Tell what property allows you to compute 1/3 × (6 × 4/3) as (1/3 × 6) × 4/3.

Solution :- 
Here, a x (b x c) = (a x b) x c in the form. So, this is associative property.

Question-8 :-  Is 8/9 the multiplicative inverse of -11⁄8 .

Solution :- 
If it will be the multiplicative inverse then their product will be 1. -11⁄8 = -7/8 8/9 × -7/8 = -7/9 ≠ 1 [a/b x c/d = 1] Hence, 8/9 is not the multiplicative inverse.

Question-9 :-  Is 0.3 the multiplicative inverse of 31⁄3 ? Why or why not?

Solution :- 
If it will be the multiplicative inverse then their product will be 1. 31⁄3 = 10/3 also, 0.3 = 3/10 3/10 × 10/3 = 1 [a/b x c/d = 1] Hence, 0.3 is the multiplicative inverse.

Answer 2

Answer:

Step-by-step explanation:

Hhhhhhhhhh