618-800÷20×5简便算法怎么算?
3个回答
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=618-(800/10) /(20/10) x5
=618-80 / 2 x 5
=618-10x(8/2 x5)
=618-10x(4x5)
=618-10x20
=618-200
=418
=618-80 / 2 x 5
=618-10x(8/2 x5)
=618-10x(4x5)
=618-10x20
=618-200
=418
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