Q11Written answer
To reduce a rational number to its standard form, we divide its numerator and denominator by their
(a) LCM (b) HCF (c) product (d) multiple
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Solution:-
(b) HCF
NCERT Exemplar · Class 7 · Maths
Chapter 8: Rational Numbers
Practice each question, then open the answer or worked solution.
Questions
55 questionsQ12Written answer
Which is greater number in the following:
(a) -½ (b) 0 (c) ½ (d) -2
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Solution:-
(c) ½
In Questions 13 to 46, fill in the blanks to make the statements true.
Q13Written answer
–(3/8) is a rational number.
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Solution:-
–(3/8) is a negative rational number.
Q14Written answer
1 is a rational number.
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Solution:-
1 is a positive rational number
Q15Written answer
The standard form of (-8/-36) is .
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Solution:-
The standard form of (-8/-36) is 2/9.
-8/-36 = 8/36
So, HCF of 8 and 36 is 4
Then, divide both numerator and denominator by 4.
= 8/36
= 2/9
Q16Written answer
The standard form of 18/-24 is
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Solution:-
The standard form of 18/-24 is -3/4.
So, HCF of 18 and -24 is 6
Then, divide both numerator and denominator by 6.
= 18/-24
= 3/-4
Now, multiplying -1 to both numerator and denominator.
= (3 × -1)/(-4 × -1)
= -3/4
Q17Written answer
On a number line, -½ is to the ______ of zero (0).
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Solution:-
On a number line, -½ is to the left of zero (0).
On a number line, rational number present to the left of the zero (0) are negative rational numbers and rational numbers present to the right of the zero (0) are positive rational numbers.
Q18Written answer
On a number line, 4/3 is to the of zero (0).
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Solution:-
On a number line, 4/3 is to the right of zero (0).
On a number line, rational number present to the left of the zero (0) are negative rational numbers and rational numbers present to the right of the zero (0) are positive rational numbers.
Q19Written answer
-½ is than 1/5.
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Solution:-
-½ is smaller than 1/5.
Q20Written answer
-3/5 is than 0.
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Solution:-
-3/5 is smaller than 0.