Question
Class 7MathematicsRational Numbers

Find the product:

(i) 20/3×(-81/16)

(ii)(-13/4)×(-11/4)

Verified Answer

(i) 62/3 × (-51/16) = (20/3) × (-81/16)

⇒ (5/1) × (-27/4)

[LCM of 8 and 6 = 24]

= (-5 × 27) / (1 × 4) = -135/4 = -333/4

(ii) (-31/4) × (-23/4) = (-13/4) × (-11/4)

= (-) × (-) × (13/4 × 11/4)

= (13 × 11) / (4 × 4) = 143/16 = 815/16

[∴ (-) × (-) = (+)]