Find: `7/(11)of\ R s\ 330` (ii) `5/9\ of\ 108` metres

Find the difference: (i) 6/7-9/(11) (ii) 8-5/9

Verify commutativity of addition of rational numbers for each of the following pairs of rational number : (i) (-11)/5\ and\ 4/7 (ii) 4/9\ and\ 7/(-12)

Which of the two rational numbers is greater in each of the following pairs? (i) 3/-7 or 1/7 , (ii) 11/(-18) or -5/18 , (iii) 7/10 or -9/10 (iv) 0 or -3/4 , (v) 1/12 or 0, (vi) 18/(-19) or 0 (vii) 7/8 or 11/16 , (viii) 11/-12 or -10/11 , (ix) -13/5 or -4 (x) 17/(-6) or -13/4 , (xi) 7/(-9) or -5/8 , (xii) -3/(-8) or 5/9

Evaluate the following : (i) 2/5 times 3/7" (ii) " 3/5 times 8/9" (iii) " 7 times 1""2/3 .

Find area of the triangle with vertices at the point given in each of the following : (i) (1,0), (6,0), (4,3) (ii) (2,7), (1,1), (10,8)

Find (i) 7/24-17/36 (ii) 5/63-((-6)/21) (iii) (-6)/13-7/11 (iv) -2/9 -6

Find the cube of : (i) 7/9 (ii) 8/(11) (iii) (12)/7 (iv) (13)/8

Find the median of (i) 7, 11, 25, 45, 23, 12, 11, 9, 10 (ii) 15, 14, 11, 9, 7, 12, 18, 20

Find the product: (i) 9/2 xx ((-7)/4) (ii) 3/(10) xx (-9) (iii) (-6)/5 xx 9/(11) (iv) 3/7 xx ((-2)/5) (v) 3/(-5) xx (-5)/3

Compare the following fractions by using the symbol > or (i) 7/9\ a n d8/(13) (ii) (11)/9\ a n d5/9