27乘以3.4加15.4乘以34减340乘以百分之81,怎么简算.

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27乘以3.4加15.4乘以34减340乘以百分之81,怎么简算.
27乘以3.4加15.4乘以34减340乘以百分之81,怎么简算.

27乘以3.4加15.4乘以34减340乘以百分之81,怎么简算.
27乘以3.4加15.4乘以34减340乘以百分之81
=27x3.4+154x3.4-3.4x81
=3.4x(27+154-81)
=3.4x100
=340

27*3.4+15.4*34-340*0.81=
=3.4(27+154-81)
=3.4*100
=340

=27×3.4+154×3.4-3.4×81
=100×3.4
=340