17/20-(1/20+3/5)脱式计算?
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发布时间:2024-10-06 16:24
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时间:2024-12-01 15:41
解:17/20-(1/20+3/5)等于( 1/5 ),【即等于0.2】
∵已知需求出17/20-(1/20+3/5)等于多少
∴17/20 - (1/20 + 3/5)
= 17/20 - 1/20 - 3/5
= 16/20 - 3/5
= 16/20 - (3×4)/(5×4)
= 16/20 - 12/20
= (16-12)/20
= 4/20
= 1/5
= 0.2
答:17/20-(1/20+3/5)等于1/5,【即等于0.2】