Wednesday, 15 April 2015

Class VIII Revision Questions

Work out the following sums

1. Represent the following as indicated
a. 0.000000000085( Standard form)
b. 1.0007 x 10^11 ( Usual form)

2. verify the following

a.   If  p = -3/2         q = 4/5    then prove that  p x q = q x p

b. With the same values of p and q  prove that  p+q = q+p

3. Find the multiplicative inverse of the following:
 a. -4/5
 b. 2/3

4.  Find the additive inverse of the following:

a.  -6/3
b.  7/9

5. Sum of 2 numbers is 3/5. If one of them is -2/7, Find the other.

6. If  x= 4/9     y= -7/12   and  z = -2/3 then verify that x-(y-z) is not equal to (x-y)-z

7. With the same values of x , y and z  show that X*(Y+Z)= X*Y + X*Z

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