脱式计算,能简便要简便。,脱式计算,能简便要简便。 3/5×1/5÷3/5 2/7-5/8×2/7 1/4÷2/3+2/3÷

2020-12-03 21:34:37 字数 8323 阅读 4199

1楼:小百合

脱式计算,能简便要简便。

3/5×1/5÷3/5

=3/5÷3/5×1/5

=1/5

2/7-5/8×2/7

=(1-5/8)×2/7

=3/8×2/7

=3/28

1/4÷2/3+2/3÷4

=3/2÷4+2/3÷4

=(3/2+2/3)÷4

=13/6÷4

=13/24

1/3÷1/5+4/5

=5/3+4/5

=37/15

[1-(1/4+3/8)]÷1/4

=(1-5/8)×4

=3/8×4

=3/2

4/9×3/16+5/12

=1/12+5/12

=1/2

3/9-1/3×3/9

=(1-1/3)×1/3

=2/9

解方程1/2x÷1/4=8

1/2x=2

x=41/4x+2/3=3

1/4x=3-2/3

1/4x=7/3

x=28/3

1/3x+1/2x=5

5/6x=5

x=62/5x+1/3×6=4

2/5x=4-2

2/5x=2

x=52/7x=1/2×3/14

2/7x=3/28

x=3/8

4.5x+x=11/17

5.5x=11/17

x=2/17

x-1/12x=22

11/12x=22

x=24

脱式计算,能简便要简便。 3/5×1/5÷3/5 2/7-5/8×2/7 1/4÷2/3+2/3÷

2楼:匡吉月卷翼

脱式计算,能简便要简便。

3/5×1/5÷3/5

=3/5÷3/5×1/5

=1/5

2/7-5/8×2/7

=(1-5/8)×2/7

=3/8×2/7

=3/28

1/4÷2/3+2/3÷4

=3/2÷4+2/3÷4

=(3/2+2/3)÷4

=13/6÷4

=13/24

1/3÷1/5+4/5

=5/3+4/5

=37/15

[1-(1/4+3/8)]÷1/4

=(1-5/8)×4

=3/8×4

=3/2

4/9×3/16+5/12

=1/12+5/12

=1/2

3/9-1/3×3/9

=(1-1/3)×1/3

=2/9

解方程1/2x÷1/4=8

1/2x=2

x=41/4x+2/3=3

1/4x=3-2/3

1/4x=7/3

x=28/3

1/3x+1/2x=5

5/6x=5

x=62/5x+1/3×6=4

2/5x=4-2

2/5x=2

x=52/7x=1/2×3/14

2/7x=3/28

x=3/8

4.5x+x=11/17

5.5x=11/17

x=2/17

x-1/12x=22

11/12x=22

x=24

脱式计算。【过程】 1/3÷(2/3-2/5)×3/5 [1/2-(3/4-3/5)]÷7/10 8/9×[3/4-(7/16-1/4)]

3楼:匿名用户

解:依题意得算式,

3分之1÷(3分之2-5分之2)×5分之3=3分之1×5分之3÷(15分之10-15分之6)=5分之1÷15分之4

=5分之1×4分之15

=4分之3

[2分之1-(4分之3-5分之3)]÷10分之7=(2分之1-4分之3+5分之3)×7分之10=(20分之10-20分之15+20分之12)×7分之10=20分之7×7分之10

=2分之1

9分之8×[4分之3-(16分之7-4分之1)]=9分之8×(4分之3-16分之7+4分之1)=9分之8×(4分之3+4分之1-16分之7)=9分之8×(1-16分之7)

=9分之8×16分之9

=2分之1

即3分之1÷(3分之2-5分之2)×5分之3=4分之3[2分之1-(4分之3-5分之3)]÷10分之7=2分之19分之8×[4分之3-(16分之7-4分之1)]=2分之1

脱式计算【能简便的要简便】①2-[1/5+(2/5-5/7)]②(2.5-2.5*0.4)÷4速度啊!!

4楼:匿名用户

①2-[1/5+(2/5-5/7)]

=2-1/5-2/5+5/7

=7/5+5/7

=49/35+25/35

=74/35;

②(2.5-2.5*0.4)÷4速度啊!!

=2.5×(1-0.4)÷4

=2.5×0.15

=0.375

如果本题有什么不明白可以追问,如果满意记得采纳如果有其他问题请采纳本题后另发点击向我求助,答题不易,请谅解,谢谢。

祝学习进步

5楼:我们不是他舅

①2-[1/5+(2/5-5/7)]

= 2- (1/5+2/5-5/7)

= 2 - 3/5 +5/7

= (70-21+25) /35

= 74 / 35

②(2.5-2.5*0.4)÷4

= 2.5x(1-0.4) /4

= 2.5 x 0.6 /4

= 1.5/4

= 3/16

脱式计算,能简便的要简便。 23/25除以(3/4+2/5) 1/7x9/13除以5/14除

6楼:莹星

23/25÷

(3/4+2/5)

=23/25÷23/20

=23/25×20/23

=4/5

1/7×9/13÷5/14÷3/13

=1/7×9/13×14/5×13/3

=6/5

=1又1/5

15/16÷(5/12÷5/8+3/8)

=15/16÷(2/3+3/8)

=15/16÷25/24

=9/10

(2/3-1/2+1/6)÷1/24

=(2/3-1/2+1/6)×24

=16-12+4=8

脱式计算(能简便要简便计算)

7楼:匿名用户

(1)3/4 ×

dao8/13+5/13×内3/4-3/4=3/4 ×(8/13+5/13-1)

=3/4×(1-1)

=3/4×0

=0(2)

3/5+(5/8+3/8)÷

容5/6

=3/5+1÷5/6

=3/5+1×6/5

=3/5+6/5

=9/5

(3)(5/6-5/8)×24

=5/6×24-5/8×24

=20-15

=5(4)

7/10÷(1-3/4×2/5)

=7/10÷(1-3/10)

=7/10÷7/10

=1(5)

4/9×[3/4-(7/16-1/4)]

=4/9×(3/4+1/4-7/16)

=4/9×(1-7/16)

=4/9×9/16

=4/16

=1/4

8楼:沐依依

3/4(8/13+5/13-1)=0

3/5+1÷5/6=3/5+6/5=9/520-15=5

7/10÷(1-3/10)=7/10÷7/10=14/9×=4/9×9/16=1/4

脱式计算能简便就要简便

9楼:水色燕子

3/7 × 49/9 - 4/3

8/9 × 15/36 + 1/27

12× 5/6 – 2/9 ×3

8× 5/4 + 1/4

6÷ 3/8 – 3/8 ÷6

4/7 × 5/9 + 3/7 × 5/95/2 -( 3/2 + 4/5 )

7/8 + ( 1/8 + 1/9 )

9 × 5/6 + 5/6

3/4 × 8/9 - 1/3

7 × 5/49 + 3/14

6 ×( 1/2 + 2/3 )

8 × 4/5 + 8 × 11/5

31 × 5/6 – 5/6

9/7 - ( 2/7 – 10/21 )5/9 × 18 – 14 × 2/7

4/5 × 25/16 + 2/3 × 3/414 × 8/7 – 5/6 × 12/1517/32 – 3/4 × 9/24

3 × 2/9 + 1/3

5/7 × 3/25 + 3/7

3/14 ×× 2/3 + 1/6

1/5 × 2/3 + 5/6

9/22 + 1/11 ÷ 1/2

5/3 × 11/5 + 4/3

45 × 2/3 + 1/3 × 15

7/19 + 12/19 × 5/6

1/4 + 3/4 ÷ 2/3

8/7 × 21/16 + 1/2

101 × 1/5 – 1/5 × 21

7/8-5/6+11/12

6/7+5/14-1/2

8-17/42-25/42

1-5/9-(2/3+5/9)

5/9-(1/6+1/12)

11/12-2/9+1/12-7/9

7/12+5/6-3/4

4/5-2/3+7/6

2/3+(5/7-5/14)

8/9-(5/6-3/4)

14/15-(1/4+7/30)

29/30-(14/15-3/4)

13/24+7/8+11/24

3-17/18-19/18

7/9+2/3-4/9

5/8+1/2+3/4

19/24+11/12-3/4

14/15+4/5-2/3

13/12-1/2-1/3

4/9-1/6+4/3

6/7-3/14+1/2

1-1/2+3/4

1/2-1/3-1/6

9/11+7/2-9/22

8/9-1/3+5/6

7/12+1/3-1/4

7/25+4/5-1/2

1/4+2/3-1/12

3/8+5/8-1

3/7-1/2+9/14

235 - 135÷18

35 ×153 – 0.6×53

(45 +14 )÷73 +710

10 - 719 - 1219 + 11925×13 ÷52 ×310

13.09-8.12-4.88

12×103-4500÷75

18 ×[12 ÷(35 ×109 )]

(215 +311 )×15×11

37.5+19.5÷2.5×4

6.9+4.8+3.1

0.456+6.22+3.78

15.89+(6.75-5.89)

4.02+5.4+0.98

5.17-1.8-3.2

13.75-(3.75+6.48)

3.68+7.56-2.68

7.85+2.34-0.85+4.66

35.6-1.8-15.6-7.2

3.82+2.9+0.18+9.1

9.6+4.8-3.6

7.14-0.53-2.47

5.27+2.86-0.66+1.63

13.35-4.68+2.65

73.8-1.64-13.8-5.36

47.8-7.45+8.8

0.398+0.36+3.64

15.75+3.59-0.59+14.2566.86-8.66-1.34

0.25×16.2×4

(1.25-0.125)×8

3.6×102

3.72×3.5+6.28×3.5

36.8-3.9-6.1

15.6×13.1-15.6-15.6×2.14.8×7.8+78×0.52

32+4.9-0.9

4.8×100.1

56.5×9.9+56.5

7.09×10.8-0.8×7.09

25.48-(9.4-0.52)

4.2÷3.5

320÷1.25÷8

18.76×9.9+18.76

3.52÷2.5÷0.4

3.9-4.1+6.1-5.9

5.6÷3.5

9.6÷0.8÷0.4

4.2×99+4.2

17.8÷(1.78×4)

0.49÷1.4

1.25×2.5×32

3.65×10.1

15.2÷0.25÷4

0.89×100.1

146.5-(23+46.5)

3.83×4.56+3.83×5.44

4.36×12.5×8

9.7×99+9.7

27.5×3.7-7.5×3.7

8.54÷2.5÷0.4

0.65×101

3.2×0.25×12.5

(45.9-32.7)÷8÷0.125

3.14×0.68+31.4×0.032

5.6÷1.25÷0.8÷2.5÷0.4

7.2×0.2+2.4×1.4

8.9×1.01

7.74×(2.8-1.3)+1.5×2.263.9×2.7+3.9×7.3

18-1.8÷0.125÷0.8

12.7×9.9+1.27

21×(9.3-3.7)-5.6

15.02-6.8-1.02

5.4×11-5.4

2.3×16+2.3×23+2.3

9.43-(6.28-1.57)

3.65×4.7-36.5×0.37

46×57+23×86

13.7×0.25-3.7÷4

2.22×9.9+6.66×6.7

101×0.87-0.91×87

10.7×16.1-15.1×10.7

0.79×199

4.8+8.63+5.2+0.37

5.93+0.19+2.81

1.76+0.195+3.24

2.35+1.713+0.287+7.651.57+0.245+7.43

6.02+3.6+1.98

0.134+2.66+0.866

1.27+3.9+0.73+16.1

7.5+4.9-6.5

3.07-0.38-1.62

1.29+3.7+2.71+6.3

8-2.45-1.55

3.25+1.79-0.59+1.75

23.4-0.8-13.4-7.2

0.32×403

3.2+0.36+4.8+1.64

1.23+3.4-0.23+6.6

0.25×36

12.7-(3.7+0.84)

36.54-1.76-4.54

0.25×0.73×4

7.6×0.8+0.2×7.6

0.85×199

0.25×8.5×4

1.28×8.6+0.72×8.6

12.5×0.96×0.8

10.4-9.6×0.35

0.8×(4.3×1.25)

3.12+3.12×99

28.6×101-28.6

0.86×15.7-0.86×14.7

2.4×102

2.31×1.2×0.5

14-7.32-2.68

2.64+8.67+7.36+11.33

70÷28

(2.5-0.25)×0.4

9.16×1.5-0.5×9.16

3.6-3.6×0.5

63.4÷2.5÷0.4

4.9÷1.4

3.9÷(1.3×5)

(7.7+1.54)÷0.7

2.5×2.4

2.7÷45

15÷(0.15×0.4)

0.35×1.25×2×0.8

32.4×0.9+0.1×32.4

15÷0.25

4.5÷1.8

4.2÷3.5

930÷0.6÷5

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