
0.8888×0.4+0.2222×8.4用简便方法计算
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0.8888*0.4+0.2222*8.4
=0.8888*0.4+0.2222*4*2.1
=0.8888*0.4+0.8888*2.1
=0.8888*(0.4+2.1)
=0.8888*2.5
=2.222
=0.8888*0.4+0.2222*4*2.1
=0.8888*0.4+0.8888*2.1
=0.8888*(0.4+2.1)
=0.8888*2.5
=2.222
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