55.4*19.9+5.54怎么简算
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55.4*19.9+5.54怎么简算55.4*19.9+5.54怎么简算55.4*19.9+5.54怎么简算原式=55.4×19.9+55.4x0.1=55.4×(19.9+0.1)=55.4x20=
55.4*19.9+5.54怎么简算
55.4*19.9+5.54怎么简算
55.4*19.9+5.54怎么简算
原式=55.4×19.9+55.4x0.1
=55.4×(19.9+0.1)
=55.4x20
=1108