简算:81÷14+17×1/14= (5/12+1/9)×72= 68÷【0.5×(7.5-0.7)】=
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![简算:81÷14+17×1/14= (5/12+1/9)×72= 68÷【0.5×(7.5-0.7)】=](/uploads/image/z/201037-13-7.jpg?t=%E7%AE%80%E7%AE%97%EF%BC%9A81%C3%B714%EF%BC%8B17%C3%971%2F14%3D+%EF%BC%885%2F12%2B1%2F9%EF%BC%89%C3%9772%3D+68%C3%B7%E3%80%900.5%C3%97%EF%BC%887.5-0.7%EF%BC%89%E3%80%91%3D)
简算:81÷14+17×1/14= (5/12+1/9)×72= 68÷【0.5×(7.5-0.7)】=
简算:81÷14+17×1/14= (5/12+1/9)×72= 68÷【0.5×(7.5-0.7)】=
简算:81÷14+17×1/14= (5/12+1/9)×72= 68÷【0.5×(7.5-0.7)】=
81÷14+17×1/14
=1/14×(81+17)
=1/14×98
=7
(5/12+1/9)×72
=5/12×72+1/9×72
=30+8
=38
68÷【0.5×(7.5-0.7)】
=68÷【0.5×6.8】
=68÷6.8÷0.5
=10÷0.5
=20
81÷14+17×1/14=1/14×(81+17)=1/14×98=7
小学的数学简便算法,可以自己找找规律的
81÷14 17×1/14=81×1/14 17×1/14=81 17×1/14=7
81÷14+17×1/14
=1/14×(81+17)
=1/14×98
=7