求625-78-125+28-74怎么算!(递等式计算)

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求625-78-125+28-74怎么算!(递等式计算)

625-78-125+28-74
=625-125+28-78-74
=500-50-74
=450-74
=376

625-78-125+28-74
=(625-125)+(28-78-74)
=500-124
=376

=(625-125)-(78-28)-74
=500-50-74
=376