1.25乘以7乘以80.8怎么简便?
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1.25乘以7乘以80.8怎么简便?
1.25乘以7乘以80.8怎么简便?
1.25乘以7乘以80.8怎么简便?
1.25乘以7乘以80.*8
=1.25*80*7+1.25*0.8*7
=100*7+1*7
=707
1.25×7×80.8
=1.25×7×8×10.1
=(1.25×8)×(7×10.1)
=10×70.7
=707
80.8=8*10.1 1.25*7*80.8=(1.25*8)*(7*10.1)=10*70.7=707
因为125×8=1000
所以1.25×7×80.8
=1.25×80.8×7
=101×7
=707
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