(39/2+51/2)×13÷25÷51,用简便方法怎么做?
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发布时间:2024-10-24 13:14
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热心网友
时间:2024-11-16 16:40
=(39+51)/2×13÷25÷51
=45×13÷25÷51
≈0.43
热心网友
时间:2024-11-16 16:40
(39/2十51/2)X13÷25÷51
二(39/2土51/2)X13义1/25X1/51
=(39/2X1/25X1/51十51/2X1/25X1/51)X13二(39/50X51十51/50X51)X13
二[(39十51)/50X51]X13
二(90/50X51)X13
二9x13/5X51二117/255
热心网友
时间:2024-11-16 16:41
(39/2+51/2)×13÷25÷51
=90/2×13÷25÷51
=45×13÷25÷51
=(5×3×3)×13÷(5×5)÷(17×3)
=3×13÷5÷17
=39÷(5×17)
=39/85