190×64+81×640的简便运算怎么写
3个回答
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190×64+81×640的计算过程
=(19+81)×640
=100×640
=64000
=(19+81)×640
=100×640
=64000
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展开全部
190×64+81×640
=19×640+81×640
=640×(19+81)
=640×100
=64000
=19×640+81×640
=640×(19+81)
=640×100
=64000
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190×64+81×640
=19×10×640+81×640
=19×640+81×640
=(19+81)×640
=100×640
=64000
=19×10×640+81×640
=19×640+81×640
=(19+81)×640
=100×640
=64000
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评论
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