87x3.16+4.6x0.316-0.33x3.16)的简便法怎么做?

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87x3.16+4.6x0.316-0.33x3.16)的简便法怎么做?

87x3.16+4.6x0.316-0.33x3.16)的简便法怎么做?
87x3.16+4.6x0.316-0.33x3.16)的简便法怎么做?

87x3.16+4.6x0.316-0.33x3.16)的简便法怎么做?
(0.87x3.16+4.6x0.316-0.33x3.16)
=(0.87x3.16+0.46x3.16-0.33x3.16)
=(0.87+0.46-0.33)x3.16
=3.16

0.87x3.16+4.6x0.316-0.33x3.16
=0.87x3.16+0.46x3.16-0.33x3.16
=3.16×(0.87+0.46-0.33)
=3.16×1
=3.16

=(0.87-0.33)x3.16+4.6x0.316
=0.54x3.16+4.6x0.316
=5.4x0.316+4.6x0.316
=(5.4+4.6)x0.316
=3.16

3.16x(0.87+0.46-0.33)