Question

Verify for any rational numbers a, b and c.
a + (b + c ) = (a + b) + c
a x ( b x c) = ( a x b) x c
by taking a = 3/5, b = ¼, c = 5/9.
Simplify by applying suitable property :(write name of the properties )
3/7 x ( 5/9 + 4/15 )
5/7 x ( -14/15 + 0 )
A factory owner recycled 7/8 of aluminium cans. Is the rational number expressing the amount of aluminium cans recycled more then ½ or less than ½ ?
which value is depicted from this question ?

Answer 1

3/7x(5/9+4/15)

3/7x (9+4/15)

3/7x (9x3+4/15)

3/7x (27+4/15)

3/7x (31/15)

3/7x31/15

91/21