一道很难的数学题
求解!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!快!!马上就要!!...
求解!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!快!!马上就要!!!!
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2014-12-29
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=2/9*3/8+3/8+7/9*3/8
=3/8*(2/9+1+7/9)
=3/8*2
=3/4
=77.5*0.125+2.5*0.125
=(77.5+2.5)*0.125
=80*0.125
=10
=3/8*(2/9+1+7/9)
=3/8*2
=3/4
=77.5*0.125+2.5*0.125
=(77.5+2.5)*0.125
=80*0.125
=10
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2014-12-29
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第一题:=0.375(2/9+1+7/9)=0.375*2=0.75
第二题:=0.125(77.5+2.5)=12.5
第二题:=0.125(77.5+2.5)=12.5
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2/9×3/8+3/8+7/9×3/8=(2/9+1+7/9)×3/8=3/4
77.5×0.125+2.5×0.125=80×0.125=10
77.5×0.125+2.5×0.125=80×0.125=10
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