Question

tính nhanh 135 x 265 - 100 x 300

Answer 1

135 x 265-100 x 300

=(100+35) x 265-100 x (265+35)

=100 x 265+35 x 265-100 x 265-100 x 35

=35 x 265-100 x 35

=35 x (265-100)

=35 x 165

=5775

Answer 2

135 x 265 - 100 x 300

= 35775 - 30000

= 5775