小学五年级数学题5/12-(1/12-1/2)=?简便计算
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小学五年级数学题5/12-(1/12-1/2)=?简便计算
小学五年级数学题5/12-(1/12-1/2)=?简便计算
小学五年级数学题5/12-(1/12-1/2)=?简便计算
5/12-(1/12-1/2)
=5/12-1/12+1/2
=1/3+1/2
=5/6
5/12-(1/12-1/2)
=(5/12-1/12)+1/2
=1/3+1/2
=5/6
5/12-(1/12-1/2)
=5/12-1/12+1/2
=5/12-1/12+1/2
=1/3+1/4
=5/6
祝你考好,或写好,按这样做绝对没错!
5/12-(1/12-1/2) =5/12-1/12+6/12 =4/12+6/12 ...
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5/12-(1/12-1/2) =5/12-1/12+6/12 =4/12+6/12 =10/12 =5/6 结果是5/6。
收起
5/12-1/12+1/2=5/6
1/12减1/2为负分数
5/12-1/12+1/2
=4/12+1×6/2×6
=4/12+6/12
=10/12
=5/6
注:/为分数线