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8-(3·68+1·4)的脱式简便运算
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8-(3.68+1.4)
=8-(3.6+0.08+1.4)
=8-(3.6+1.4+0.08)
=8-(5+0.08)
=8-5-0.08
=2.82
=8-(3.6+0.08+1.4)
=8-(3.6+1.4+0.08)
=8-(5+0.08)
=8-5-0.08
=2.82
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