Question

tính nhanh : 27 . 129 - 29 . 27 + 100 . 73

Answer 1

27 x 129 - 29 x 27 + 100 x 73

= 27 x ( 129 - 29 ) + 100 x 73

=27 x 100 + 100 x 73

=100 x (27 + 73 )

= 100 x 100

= 10000

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Answer 2

\(27.\left(129-29\right)+100.73\)

\(27.100+100.73\)

\(100.\left(27+73\right)\)

\(100.100=10.000\)

tích ak 

Answer 3

27.[129-29+100].73

=27.[100+100].73

=27.100+100.73

=100.[27+73]

=100.100

=10000