Question

28×111+999×8用脱式计算来简便计算。

Answer 1

28×111+999×8
=28×111+111×9×8
=28×111+111×72
=（28+82）×111
=100×111
=11100

Answer 2

28x111+999x8
=28x111+111x9x8
=28x111+111x72
=111x(28+72)
=111x100
=11100.

Answer 3

=(20+8)*111+999*8
=20*111+8*111+999*8
=2220+8*(111+999)
=2220+8*1110
=11100

Answer 4

28×111+999×8
=28×111+111×9×8
=111×【28+9×8】
=111×（28+72）
=111×100
=11100

Answer 5

28×111+999×8
=28×111+111×9×8
=28×111+111×72
=111×(28+72)
=111×100
=11100