99乘31.8+31.8 怎么算简便就怎么算

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99乘31.8+31.8 怎么算简便就怎么算

99乘31.8+31.8 怎么算简便就怎么算
99乘31.8+31.8 怎么算简便就怎么算

99乘31.8+31.8 怎么算简便就怎么算
99x31.8+31.8
=31.8x(99+1)
=31.8x100
=3180

(99+1)*31.8

99x31.8+31.8
=99x31.8+1x31.8
=31.8x(99+1)
=31.8x100
=3180

99*31.8+31.8=31.8*(99+1)=31.8*100=3180

99×31.8+31.8
=31.8×(99+1)
=31.8×100
=3180