
6.8-(4/5 0.4÷3/5)×3简算
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6.8-(4/5+ 0.4÷3/5)×3简算
=6.8-(4/5+2/5×5/3)×3
=6.8-(4/5+2/3)×3
=6.8-22/15×3
=6.8-4.4
=2.8
=6.8-(4/5+2/5×5/3)×3
=6.8-(4/5+2/3)×3
=6.8-22/15×3
=6.8-4.4
=2.8
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