Question

Tính hợp lí :

1)-56+8x(11+7)

2)47x(23+50)-23x(47+50)

Answer 1

1/ (-56) + 8.(11 + 7) = (-56) + 8.11 + 56 = 8.11 = 88

2/ 47.(23 + 50) - 23.(47 + 50) = 47.23 + 47.50 - 23.47 - 23.50

   = 47.(23 - 23) + 50.(47 - 23)

   = 0 + 50.24 = 1200

Answer 2

1)-56+8x(11+7)=88

2)47x(23+50)-23x(47+50)=1200

Answer 3

1)=-56+8.11+8.7

=(-56+56)+88

=88

2)=47.23+47.50-23.47-23.50

=(47.23-23.47)+(47.50-23.50)

=23(47-47)+50(47-23)

=0+50.24

=1200