Question

Tinh bang cach thuan tien :

a) 365*12*4+365*52                      b) 48*18+24*64

Answer 1

a) 365.12.4+365.52=365.(12.4)+365.52=365.48+365.52=365.(48+52)=365.100=36 500

b)48.18+24.64=24.2.18+24.64=24.(2.18)+24.64=24.36+24.64=24.(36+64)=24.100=2 400

Answer 2

a)365x12x4+365x2

=365x48+365x2

=365(48+20

=365x50

=18250

 

b)48x18+24x64

=48x18+24x2x32

=48x18+48x32

=48x(18+32)

=48x50

=2400