Exercise - R-1
1. Find the value of 12 upto two decimal places using square root,
2. Write two irrational numbers whose sum and product are rational.
3. Write all integers between -5 and 5 with the help of number line.
4. In the property of indices am + a" = am", taking m = n, show that
a = 1
5. In the property of indices a = am ", taking m = 0, show that
1
a"
6. Find LCM and HCF of the following pairs of numbers using prime
factorisation method.
(i) 321, 396, (ii) 455, 42 (iii) 408, 170
2 1
7. Write two rational numbers between and 1
11 6
8. Simplify V10x V5 and find its approximate value taking V2 = 1.41.
P
9
from
9. Express in
(iii) 2.47
(ii) 0.18
(i) 0.gi
(iv) 2.4431
(11) (2/3 + 5)(2/3 - 15)
10. Simplify:
( 13 - v2)'
(iii) (8 + 13)< (2 + 13)
(1) J 14 3
(iv) 1+2
7+√3
(vi) 7-13
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