3. Express the following in the form P, where p and q are integers and q +0.
9
(ii) 0.47
(i) 0.6
(v) 0.59
(iii) 0.001
(vii) 32.1235
(iv) 0.54
(viii) 0.37
(vi) 0.345*
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1
Answer:
Let x=0.4
7
ˉ
(Mixed recurring decimal)
i.e. x=0.47777…(1)
Multiplying (1) by 10, to make it pure recurring decimal, we get
10x=4.7777…(2)
Further multiplying (2) by 10, we get
100x=47.777….(3)
Subtracting (2) from (3), we get
100x–10x=(47.777…)–(4.7777…)
⇒90x=43
⇒x=
90
43
Thus 0.4
7
ˉ
=
90
43
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