Question

tính nhanh

25 x 4  + 75 x 6 = 

85,35 x 6 + 25,65 = 

Answer 1

25 x 4  + 75 x 6 = 100 + 450

                          = 550

85,35 x 6 + 25,65 = ( 85,35 + 25 , 65 ) x 6

                             = 111 x 6

                            = 666

Answer 2

a, 25.4+75.6=25.4+25.18=25.22=550

b, 85,35.6+25,65

=85,35.5+101=.....

Answer 3

Ta có : a) \(25\times4+75\times6=25\times4+25\times3\times6\)

\(=25\times4+25\times18=25\times\left(4+18\right)\)

\(=25\times22=550\)