57.38-(40.9-2.62) (怎样简便怎样计算)

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57.38-(40.9-2.62) (怎样简便怎样计算)

57.38-(40.9-2.62) (怎样简便怎样计算)
57.38-(40.9-2.62) (怎样简便怎样计算)

57.38-(40.9-2.62) (怎样简便怎样计算)
57.38-(40.9-2.62)
=57.38+2.62-40.9
=60-40.9
=19.1

原式=57.38+2.62-40.9
=60-40.9
=19.1