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Geometrical Method to Find Square Root of a Number

Question 78Su...

Question

Question 78
Subtraction of rational number is commutative

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Solution

False
Subtraction of rational numbers is not commutative
i.e. $a - b \neq b - a$
where, a and b are rational numbers.

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Q. Question 78
Subtraction of rational number is commutative

Q. Write 'T' for true and 'F' for false for each of the following:
(i) Rational numbers are always closed under subtraction.
(ii) Rational numbers are aways closed under division.
(iii) 1 ÷ 0 = 0.
(iv) Subtraction is commutative on rational numbers.
(v)

- (\frac{- 7}{8}) = \frac{7}{8} .

Q. (i) Which rational number is its own additive inverse?
(ii) Is the difference of two rational numbers a rational number?
(iii) Is addition commutative on rational numbers?
(iv) Is addition associative on rational numbers?
(v) Is subtraction commutative on rational numbers?
(vi) Is subtraction associative on rational numbers?
(vii) What is the negative of a negative rational number?

Q. Which of the following alternatives is wrong? Given that
(i) difference of two rational numbers is a rational number
(ii) subtraction is commutative on rational numbers
(iii) addition is not commutative on rational numbers.

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is a rational number:

(i) Difference of two

Q

Q

(ii) Subtraction is commutative on

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(iii) Addition is not commutative on

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Which option is wrong?

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Geometrical Method to Find Square Root of a Number

Standard IX Mathematics

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