Question

d) 19,83×79+0,12458×17+21×19,83+17×0.87542

Answer 1

19,83 x (79+21) + 17 x ( 0,12458 + 0,87542 )

= 19,83 x 100 + 17 x 1

= 1983 + 17

= 2000

Answer 2

= (19,83 x 79 + 21 x 19,83 ) + ( 0,12458 x17 + 17 x 0,87542)

=   19,83 x ( 79 + 21)  + (0,12458 + 0,87542) x 17

= 19,83 x 100                +     1 x17

=      1983 + 17   

=              2000