43.2*22.8+86.4*38.6怎么算

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43.2*22.8+86.4*38.6怎么算43.2*22.8+86.4*38.6怎么算43.2*22.8+86.4*38.6怎么算43.2*22.8+86.4*38.6=43.2*22.8+43.2

43.2*22.8+86.4*38.6怎么算
43.2*22.8+86.4*38.6怎么算

43.2*22.8+86.4*38.6怎么算
43.2*22.8+86.4*38.6
=43.2*22.8+43.2*2*38.6
=43.2*22.8+43.2*77.2
=43.2*(22.8+77.2)
=43.2*100
=4320