Question

tính nhanh:

19 x 54 + 38 x 46

Answer 1

    19 x  54 + 38 x 46 

=   19 x 54 + 19 x 46 + 19 x 46

=   19 x ( 54 + 46 +46 )

=    19 x 146

=     2774

Answer 2

( 19 x 54 ) + ( 38 x 46 )

= 1026 + 1748

= 2774

Answer 3

    19x54+38x46

 = 19x54+19x2x46

= 19x2x(54+56)

= 38x100

= 3800

K mk nha

Answer 4

19x54+38x46

19x54+19x46+19x46

=19x(54+46+46)

=19x146

=2774