怎样简便就怎么算7.8-1.36+3.2-0.64

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怎样简便就怎么算7.8-1.36+3.2-0.64怎样简便就怎么算7.8-1.36+3.2-0.64怎样简便就怎么算7.8-1.36+3.2-0.647.8-1.36+3.2-0.64=7.8+3.2

怎样简便就怎么算7.8-1.36+3.2-0.64
怎样简便就怎么算7.8-1.36+3.2-0.64

怎样简便就怎么算7.8-1.36+3.2-0.64
7.8-1.36+3.2-0.64
=7.8+3.2-(1.36+0.64)
=11-2
=9

7.8-1.36+3.2-0.64
=7.8+3.2-(1.36+0.64)
=11-2
=9