0.999x0.7+0.111x2.7简便

2025-05-17 04:31:49
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回答(1):

0.999x1.3-0.111x2.7
=0.999x1.3-0.111x(9x0.3)
=0.999x1.3-0.999x0.3
=0.999(1.3-0.3)
=0.999