Question

Tính nhanh:

92 x 87 + 207 x 87 + 87

Answer 1

92 x 87 + 207 x 87 + 87 = 87 x ( 92 + 207 + 1 )

                                          = 87 x 300

                                          = 26100

Answer 2

92 x 87 + 207 x 87 + 87

= 87 x ( 92 + 207 + 1 )

= 97 x 300

= ( 100 - 3 ) x 300

= 100 x 300 - 3 x 300

= 30000 - 900

= 29100

Answer 3

92 x 87 + 207 x 87 + 87

= 87 x ( 92 + 207 + 1 )

= 87 x 300

= 87 x 3 x 100

= 261 x 100

= 26100

Answer 4

92 x 87 + 207 x 87 + 87 = 87 x (92 + 207 + 1)

= 87 x 300 = 26100

Answer 5

92.87+207.87+87

=92.87+207.87+1.87

=(92+207+1).87

=300.87

=26100