
怎样用简便方法计算29.64-(8.57-4.365)
2个回答
展开全部
29.64-(8.57-4.365)
=29.64-(8.57-4.36-0.005)
=29.64-8.57+4.36+0.005
=29.64+4.36+8.57+0.005
=30+(8.57+0.005)
=30+8.575
=38.575
=29.64-(8.57-4.36-0.005)
=29.64-8.57+4.36+0.005
=29.64+4.36+8.57+0.005
=30+(8.57+0.005)
=30+8.575
=38.575
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