328-(284-172)简便计算

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328-(284-172)简便计算

328-(284-172)简便计算
328-(284-172)简便计算

328-(284-172)简便计算
328-(284-172)
=328-284+172
=328+172-284
=500-284
=216

328+172-284 =216

328-(284-172)
=328-284+172
=328+172-284
=500-284
=216

328-(284-172)
=328-284+172
=328+172-284
=500-284
=216

原式=328+172-284 =216