Question

巧算数学题28×111+111×30+111×42

巧算数学题28×111+111×30+111×42

Answer 1

28×111+111×30+111×42
=111x(28+30+42)
=111x100
=11100

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Answer 2

＝111×（28+30+42）
＝111×100
＝11100

Answer 3

=（28+30+42）×111
=100×111
=11100

Answer 4

=（28+30+42）x111
=100x111
=11100

Answer 5

111×（28+42+30）＝11100