Question

Tính nhanh

47×(23+50)-23×(47+50)

 

Answer 1

47x(23+50)-23x(47+50)

=47x23+47x50-23x47-23x50

=47x(23-23)-50x(47-23)

=47x0-50x24

=0-1200

=-1200

Answer 2

47 x(23 +50 )-23 x(47 +50)

=47x 23 +  47 x50 -23 x47 +23 x50

=0     

Answer 3

47.(23+50)-23.(47+50)

=47.23+47.50-23.47+23.50

=(47.23-23.47)+47.50+23.50

=(47.23-23.47)+(47+23).50

=0+70.50

=0+3500=3500.