1.脱式计算1)2/13×5/8÷15/262)8/9÷2/3÷1/43)2/7×14/15×5/64)8/9÷5/6×5/165)5/3÷10÷5/66)2/13×39×5/212.下面各题怎样简便就怎样算,每题都要写出主要的计算过程.1)12×1/3+12÷2/32)1/7+5/7÷5/6+5/123)(3/
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![1.脱式计算1)2/13×5/8÷15/262)8/9÷2/3÷1/43)2/7×14/15×5/64)8/9÷5/6×5/165)5/3÷10÷5/66)2/13×39×5/212.下面各题怎样简便就怎样算,每题都要写出主要的计算过程.1)12×1/3+12÷2/32)1/7+5/7÷5/6+5/123)(3/](/uploads/image/z/1060720-16-0.jpg?t=1.%E8%84%B1%E5%BC%8F%E8%AE%A1%E7%AE%971%EF%BC%892%2F13%C3%975%2F8%C3%B715%2F262%EF%BC%898%2F9%C3%B72%2F3%C3%B71%2F43%EF%BC%892%2F7%C3%9714%2F15%C3%975%2F64%EF%BC%898%2F9%C3%B75%2F6%C3%975%2F165%EF%BC%895%2F3%C3%B710%C3%B75%2F66%EF%BC%892%2F13%C3%9739%C3%975%2F212.%E4%B8%8B%E9%9D%A2%E5%90%84%E9%A2%98%E6%80%8E%E6%A0%B7%E7%AE%80%E4%BE%BF%E5%B0%B1%E6%80%8E%E6%A0%B7%E7%AE%97%2C%E6%AF%8F%E9%A2%98%E9%83%BD%E8%A6%81%E5%86%99%E5%87%BA%E4%B8%BB%E8%A6%81%E7%9A%84%E8%AE%A1%E7%AE%97%E8%BF%87%E7%A8%8B.1%EF%BC%8912%C3%971%2F3%2B12%C3%B72%2F32%EF%BC%891%2F7%2B5%2F7%C3%B75%2F6%2B5%2F123%EF%BC%89%EF%BC%883%2F)
1.脱式计算1)2/13×5/8÷15/262)8/9÷2/3÷1/43)2/7×14/15×5/64)8/9÷5/6×5/165)5/3÷10÷5/66)2/13×39×5/212.下面各题怎样简便就怎样算,每题都要写出主要的计算过程.1)12×1/3+12÷2/32)1/7+5/7÷5/6+5/123)(3/
1.脱式计算
1)2/13×5/8÷15/26
2)8/9÷2/3÷1/4
3)2/7×14/15×5/6
4)8/9÷5/6×5/16
5)5/3÷10÷5/6
6)2/13×39×5/21
2.下面各题怎样简便就怎样算,每题都要写出主要的计算过程.
1)12×1/3+12÷2/3
2)1/7+5/7÷5/6+5/12
3)(3/4-1/15×9)÷3/5
4)97×5/96
5)(3/5+3/10)÷(1-1/10)
6)5/8×4/7÷5/7
1.脱式计算1)2/13×5/8÷15/262)8/9÷2/3÷1/43)2/7×14/15×5/64)8/9÷5/6×5/165)5/3÷10÷5/66)2/13×39×5/212.下面各题怎样简便就怎样算,每题都要写出主要的计算过程.1)12×1/3+12÷2/32)1/7+5/7÷5/6+5/123)(3/
1)2/13×5/8÷15/26
=2/13x5/8x26/15
=1/6
2)8/9÷2/3÷1/4
=8/9x3/2x4
=16/3
3)2/7×14/15×5/6
=4/15x5/6
=2/9
4)8/9÷5/6×5/16
=8/9x6/5x5/16
=1/3
5)5/3÷10÷5/6
=5/3x1/10x6/5
=1/5
6)2/13×39×5/21
=6x5/21
=15/7
2.下面各题怎样简便就怎样算,每题都要写出主要的计算过程.
1)12×1/3+12÷2/3
=12x1/3+12x3/2
=(1/3+3/2)x12
=11/6x12
=22
2)1/7+5/7÷5/6+5/12
=1/7+5/7x6/5+5/12
=1/7+6/7+5/12
=1+5/12
=17/12
3)(3/4-1/15×9)÷3/5
=(3/4-1/15×9)x5/3
=(3/4-3/5)x5/3
=3/4x5/3-3/5x5/3
=-1/4
4)97×5/96
=(96+1)x5/96
=96x5/96+5/96
=5又5/96
5)(3/5+3/10)÷(1-1/10)
=(3/5+3/10)x10/9
=9/10x10/9
=1
6)5/8×4/7÷5/7
=5/8x4/7x7/5
=1/2