Question

Tính nhanh:

64.6+81.4+17.6

Answer 1

= 6.(17+64)+81.4

= 6.81+81.4

= 81.(4+6)

= 81.10

= 810

Answer 2

64.6+81.4+17.6

=(64+17).6+81.4

=81.6+81.4

=81.(6+4)

=81.10

=810

Answer 3

64 x 6 + 81 x 4 + 17 x 6

= (64 + 17) x 6 + 81 x 4

=       81 x 6 + 81 x 4

= 81 x (6 + 4)

= 81 x    10

= 810

Answer 4

64.6+81.4+17.6

=[64.6+17.6]+81.4

=[6.(64+17)]+81.4

=282+324

=606

Answer 5

   64.6 + 81.4 + 17.6

= (64 + 17).6 + 81.4

= 81.6 + 81.4

= 81.(6 + 4)

= 81.10

= 810