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用简便方法计算:6.58-(1.58+1.98)
人气:120 ℃ 时间:2019-12-26 04:27:03
解答
6.58-(1.58+1.98)
=6.58-1.58-1.98
=5-(2-0.02)
=5-2+0.02
=3.02
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