1樓:凌月霜丶
(5/6-3/4)÷(2/3十4/9)用最簡便方法(5/6-3/4)÷(2/3十4/9)
=(10/12-9/12)÷(6/9+4/9)=1/12*9/10
=3/40
(5/6-3/4)÷(2/3+4/9) (1-1/6×2/5)÷7/9
2樓:新野旁觀者
(5/6-3/4)÷(2/3+4/9)
=1/12÷10/9
=3/40
(1-1/6×2/5)÷7/9
=(1-1/15)÷7/9
=14/15÷7/9
=6/5
(5/9+1/13)×9+4/13
=5/9×9+1/13×9+4/13
=5+(9/13+4/13)
=5+1
=65/4-(3/4-1/8)-3/8
=(5/4-3/4)-(3/8-1/8)
=1/2-1/4
=1/4
3樓:kz菜鳥無敵
(5/6-3/4)÷(2/3+4/9)
= (10/12-9/12)÷(6/9+4/9)=1/12÷10/9
=1/12 x 9/10
=3/40
~~~~~~ (1-1/6×2/5)÷7/9=(1-1/15) ÷ 7/9
=14/15 x 9/7
=6/5
~~~~~
(5/9+1/13)×9+4/13
=5/9 x 9 + 1/13 x 9 +4/13=5 + 9/13 + 4/13
=5 + 1
=6~~~~~
5/4-(3/4-1/8)-3/8
=5/4 - ( 6/8 - 1/8 ) - 3/8=5/4 - 5/8 -3/8
=5/4 - 1
=1/4
括號5/6-3/4-2/3÷(1/36)簡便方法
4樓:匿名使用者
=(2/3+5/6-3/4)×24 =2/3×24+5/6×24-3/4×24 =16+20-18 =18
4/9÷[(5/6-3/4)x2/3]
5樓:妙酒
4/9÷[(5/6-3/4)x2/3]
=4/9÷(1/12x2/3)
=4/9÷1/3
=4/3
6樓:山塘人山塘人
4/9÷[(5/6-3/4)×2/3]
=4/9÷[(10/12-9/12)×2/3]=4/9÷(1/12 ×2/3)
=4/9÷1/18
=4/9×18=8
1/(2/3)/(3/4)/(4/5)/(5/6) 數學 用簡便方法計算
7樓:魔molan狼
1/(2/3)/(3/4)/(4/5)/(5/6)注意約分,4-4 5-5 3-3
=1x3/2x4/3x5/4x6/5 剩下=1x1/2x6
=3主要就是掌握約分的技巧
祝學習進步
8樓:匿名使用者
1/(2/3)/(3/4)/(4/5)/(5/6)=1÷(2/3)÷(3/4)÷(4/5)÷(5/6)=1 × 3/2 × 4/3 × 5/4 × 6/5
=1×6/2=3
梯等式計算(能簡便的要簡便) 4/9×[3/4-(9/16-3/8)] 36÷[(5/6-2/3)
9樓:kz菜鳥無敵
梯等式計算(能簡便的要簡便)
4/9×[3/4-(9/16-3/8)]
=4/9*3/4-4/9*9/16+4/9*3/8=1/3-1/4+1/6
=1/4
36÷[(5/6-2/3)×3]
=36 / [(5/6-4/6)*3]
=36 / 1/2
=72(1/15+2/17)×15×17
=1/15*15+2/17*17*15
=1+2*15
=31(4/3-3/4÷3)×12
=4/3*1/2-1/4*1/2
=2/3-1/8
=13/24
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