Fill in the blanks:
(i) −4×79=79× ___
(ii) 511×−38=−38× ___
(iii) 12×(34+−512)=12× ____ +(×)−512
(iv) −45×57×___ =(−45×57)×−89
Rationalise the denominators of each of the following:
(i) 3√5
(ii) 32√5
(iii) 1√12
(iv) √2√5
(v) √3+1√2
(vi) √2+√5√3
(vii) 3√2√5