Page 40 - ICSE Math 7

MENTAL MATHS

1. Choose the correct answer.
(a) If a mixed fraction is converted into fraction, then its reciprocal is ________.

(i) proper fraction (ii) improper fraction
(iii) equal to itself (iv) none of these
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(b) The number of months in th of a century is ________.
5
(i) 60 (ii) 600 (iii) 720 (iv) 7.3
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(c) 474 surgeons were invited for a conference on the latest surgical techniques and of those
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invited actually participated in it. The number of participants was ________.
(i) 359 (ii) 395 (iii) 474 (iv) 568

(d) Which of the following is a pair of like fractions?

4
5
,
,
(i) 3 , 3 (ii) 3 , 2 (iii) 21 21 (iv) 23 13
5 4 11 11 25 13 13 23
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(e) Which of the following is equivalent to ?
5
9
(i) 33 (ii) (iii) 3 (iv) 5
55 5 20 3
(f) The fraction representing the shaded region in the given figure is ________.

3
3
(i) 3 (ii) 3 (iii) (iv) 3 1
4 4 2
2. Write True or False.

(a) Subtraction of fractions with different denominators is not possible.
(b) While simplifying an expression, we perform addition before multiplication.
(c) The reciprocal of an improper fraction can be obtained by interchanging the numerator with
the denominator.
(d) Equivalent fractions always have the same denominator.

(e) The product of two proper fractions is greater than each of the fractions.

PRACTICE TIME

1. Find x and y so that 9 = x = 45 .
14 28 y

2. Arrange the following fractions in ascending order.
4 7 9 5 2 5 7 20 4 11 17 1 13 25
(a) , , , (b) , , , (c) , , (d) , ,
9 9 9 9 3 6 9 27 5 30 35 12 16 32

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