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6.84-(3.5-0.84)简便方法?
3个回答
展开全部
6.84-(3.5-0.84)没有简便方法。
6.84-(3.5+0.84)
简便方法:
6.84-3.5-0.84
=6.84-0.84-3.5
=6-3.5
=2.5
6.84-(3.5+0.84)
简便方法:
6.84-3.5-0.84
=6.84-0.84-3.5
=6-3.5
=2.5
展开全部
6.84-(3.5-0.84)
=6.84-3.5+0.84
=3.34+(1-0.16)
=3.34+1-0.16
=4.34-0.16
=4.18
=6.84-3.5+0.84
=3.34+(1-0.16)
=3.34+1-0.16
=4.34-0.16
=4.18
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展开全部
6.84-(3.5-0.84)
=6.84-3.5+0.84
=3.34+0.84
=4.18
=6.84-3.5+0.84
=3.34+0.84
=4.18
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