六年级上册数学分数脱式计算

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  1、7/25×4/9+7/25×5/9

  =7/25×(4/9+5/9)

  =7/25×1

  =7/25

  2、60×(1/12+1/15+1/4)

  =60×1/12+60×1/15+60×1/4

  =5+4+15

  =24

  3、(5/12-3/8)×72

  =5/12×72-3/8×72

  =30-27

  =3

  4、6/7-5/24÷7/12

  =6/7-5/24×12/7

  =12/14-5/14

  =7/14

  =1/2

  5、[3/4×(7/16-1/4)]÷9/13

  =3/4×(7/16-4/16)×13/9

  =1/4×3/16×13/3

  =13/64

  6、2/3-7/8+1/3

  =(2/3+1/3)-7/8

  =1-7/8

  =1/8

  7、5/6-(3/7-1/6)

  =(5/6+1/6)-3/7

  =1-3/7

  =4/7

  8、1-1/3-2/3

  =1-(1/3+2/3)

  =1-1

  =0

  9、1+3/5-1/10

  =1+6/10-1/10

  =1+1/2

  =1又1/2

  10、3/8-12/13+5/8

  =3/8+5/8-12/13

  =1-12/13

  =1/13

  11、1-(1/2-3/4)

  =1+3/4-2/4

  =1+1/4

  =5/4

  12、1-1/2-1/4

  =1/2-1/4

  =2/4-1/4

  =1/4

  13、2/7-8/9+5/7

  =(2/7+5/7)-8/9

  =1-8/9

  =1/9

  14、2-1/4-3/4

  =2-(1/4+3/4)

  =2-1

  =1

  15、1/2-(3/8-1/2)

  =1/2+1/2-3/4

  =1-3/8

  =5/8

  16、2.64×1.7-2.64×0.7

  =2.64×(1.7-0.7)

  =2.64×1

  =2.64

  17、31.5×1.07-3.15×0.7

  =3.15×10.7-3.15×0.7

  =3.15×(10.7-0.7)

  =3.15×10

  =31.5

  18、2.7×5.7-2.7+5.3×2.7

  =2.7×(5.7-1+5.3)

  =2.7×10

  =27

  19、0.625÷0.125×0.8

  =(0.625×0.8)×8÷(0.125×8)

  =0.5×8÷1

  =4

  20、18.6×6.1+3.9×18.6

  =18.6×(6.1+3.9)

  =18.6×10

  =186

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