(8分之1×3分之1)×3×8= (2分之1十7分之1)×2×7= 6分之1×7分之4+7分之3×
(8分之1×3分之1)×3×8=
(2分之1十7分之1)×2×7=
6分之1×7分之4+7分之3×6分之1=
(5分之4+10分之9)×20=
人气:318 ℃ 时间:2020-01-29 03:42:00
解答
(8分之1×3分之1)×3×8=1
(2分之1十7分之1)×2×7=7+2=9
6分之1×7分之4+7分之3×6分之1=6分之1×(7分之4+7分之3)=6分之1×1=6分之1
(5分之4+10分之9)×20=16+18=34是脱式计算
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