Exercise 5.3
Contents
1. Multiply:
(i) (7/11) by (5/4)
(ii) (5/7) by (-3/4)
(iii) (-2/9) by (5/11)
(iv) (-3/13) by (-5/-4)
Solution:
(i) Given (7/11) by (5/4)
(7/11) ×(-5/-4) = (35/44)
(ii) Given (5/7) by (-3/4)
(5/7) ×(-3/4) = (-15/28)
(iii) Given (-3/13) by (-5/-4)
(-3/13) ×(-5/-4) = (-15/68)
2. Multiply:
3. Simplify each of the following and express the result as a rational number in standard form:
(i) (-16/21) ×(14/5)
Solution:
Given (-16/21) ×(14/5)
(-16/21) ×(14/5) = (224/105)
= (-32/15)
(ii) (7/6) ×(-3/28)
Solution:
Given (- 7/6) ×(-3/28)
(-16/21) × (-3/28)=(-21/168)
= (-1/8)
(iii) (-19/36) ×16
Solution:
Given (-19/36) ×16
(-19/36) ×16=(-304/36)
= (-76/9)
(iv) (-13/9) × (27/-26)
Solution:
Given (-13/9) ×(27/-26)
(-13/9) ×(17/-26) = (-351/234)
= (3/2)