1.25*7.1+1/8*2.6+0.375的简便算法
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1.25*7.1+1/8*2.6+0.375的简便算法
1.25*7.1+1/8*2.6+0.375
=10/8*7.1+1/8*2.6+3/8
=1/8(71+2.6+3)
=1/8*76.6
=9.575
=10/8*7.1+1/8*2.6+3/8
=1/8(71+2.6+3)
=1/8*76.6
=9.575