Question

Tính nhanh:

( 7,68 x 35 + 65 x 7,68 ) x ( 700 x 0,1 - 70 ) + 30

Answer 1

=(7,68x35+68x7,68)x(70-70)+30

=(7,68x35+68x7,68)x0+30

=0+30=30

Answer 2

(7.68*35+65*7.68)*(700*0.1-70)+30

=7.68*(35+65)*6930+30

=7.68*100*6930+30

=768*6930+30

=5322270

Answer 3

(7,68 x 35 + 65 x 7,68) x (700 x 0,1 - 70) + 30 

= 0 + 30 

= 30