Page 43 - Start Up Mathematics_7

Grid Fun
S M U L T I P L Y
Find ten words and categorize them as a term connected
to Addition, Multiplication, Division and Measurement D I N C H O F T U
of Distance or Time. I N S F D I A O R
Q U O T I E N T T
O T X L V Y E A R
M E Z V I O N L X
E A P Q S U M A N
T A G R I R C E P
R T P R O D U C T
E P R Z N L O N R

At a Glance

a
1. A fraction is a number which can be written in the form , where both a and b are natural
b
numbers. The number a is called the numerator and b the denominator.

2. A proper fraction is one in which the numerator is smaller than the denominator.
3. An improper fraction is one in which the numerator is greater than or equal to the denominator.

4. Mixed fraction is a combination of a whole number and a proper fraction.

5. The numerator of the product of fractions is the product of their numerators, and the
denominator of the product of fractions is the product of their denominators.
6. The product of two proper fractions is less than each of the fractions. The product of a proper
and an improper fraction is always less than the improper fraction.

7. A reciprocal or multiplicative inverse of a non-zero fraction is obtained by interchanging
its numerator and the denominator.
8. When a number or fraction is divided by another number or fraction, we multiply the first
number or fraction by the multiplicative inverse or reciprocal of the second number or fraction.

Review Exercises

Multiple ChoiCe Questions

1. If a mixed fraction is converted into fraction, then its reciprocal is:

(a) proper (b) improper (c) equal to itself (d) none of these
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2. The number of months in th of a century is:
5
(a) 60 (b) 600 (c) 720 (d) 7.3
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3. 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:

(a) 359 (b) 395 (c) 474 (d) 568

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