**Q.1: Write the additive inverse of the following rational numbers:**

a) 4/5

b) 8/(-5)

c) (-3)/(-10)

d) (-1)/5

e) (-11)/(-13)

**Q.2: Write the multiplicative inverse of the following rational numbers:**

a) 5

b) (-7)

c) 7/5

d) (-8)/3

e) (-5)/(-6)

**Q.3: Name the property used in each of the following rational numbers:**

a) ( 5/9 + 3/5 ) + 5/7 = 5/9 + ( 3/5 + 5/7 )

b) 4/11 x 1 = 4/11

c) 5/7 + 4/8 = 4/8 + 5/7

d) ( 3/9 x 4/5 ) x 8/9 = 3/9 x ( 4/5 x 8/9 )

e) 5/7 x 9/11 = 9/11 = 5/7

**Q.4: Verify that – (-x) = x for:**

a) x = 12/13

b) x = (-11)/21

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