脫式計算,能簡便要簡便。,脫式計算,能簡便要簡便。

2021-05-10 22:20:32 字數 6665 閱讀 3344

1樓:匡吉月卷翼

脫式計算,能簡便要簡便。

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

脫式計算:3/8÷(1-5/12-1/12),(2/5+3/7)ⅹ3.5? 20

2樓:樂為人師

3/8÷(1-5/12-1/12)

=3/8÷(7/12-1/12)

=3/8÷1/2

=3/4

(2/5+3/7)ⅹ3.5

=2/5ⅹ3.5+3/7ⅹ3.5

=1.4+1.5

=2.9

3/4÷(3/5-3/5x1/3)

=3/4÷(3/5-1/5)

=3/4÷2/5

=15/8

3樓:匿名使用者

解題過程和結果請開啟圖

4樓:平凡人生底蘊

=3/8÷6/12

=3/8ⅹ2

=3/4

=2/5x3.5+3/7×3.5

=1.4+1.5

=2.9

5樓:匿名使用者

3/8÷(1-5/12-1/12)

=3/8÷(7/12-1/12)

=3/8÷6/12

=3/8×12/6

=3/4

(2/5+3/7)×3.5

=(14/35+15/35)×3.5

=29/35×3.5

=2.9

6樓:匿名使用者

好難啊我不會(θˍθ=)請原諒?

簡便計算大全五年級

7樓:新野旁觀者

0.25×

0.28

0.125×3.2×2.5

35×40.2

0.25×4÷0.25×4

3.5×99+3.5

3.5×101-3.5

3.5×9.9+3.5×0.1

3.5×2.7+35×0.73

3.5×2.7-3.5×0.7

(32+5.6)÷0.8

3.5÷0.6-0.5÷0.6

4.9÷3.5 7÷0.25÷4

7÷0.125 ÷8

7.35÷(7.35×0.25)

7.35÷(7.35÷0.25)

3.29+0.73+2.27

3.29-0.73-2.27

7.5+2.5-7.5+2.5

7.325-3.29-3.325

7.325-(5.325+1.7)

7.325-(5.325-1.7)

3.29+0.73-2.29+2.27

3.29×0.25×4

0.125×8.8

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

0.35×1.25×2×0.8

32.4×0.9+0.1×32.4

15÷0.25

28.6×101-28.6

0.86×15.7-0.86×14.7

2.4×102

14-7.32-2.68

2.65+8.67+7.35+11.33

2.31×1.2×0.5

(2.5-0.25)×0.4

9.16×1.5-0.5×9.16

3.6-3.6×0.5

7.6×0.8+0.2×7.6

0.85×199

0.25×8.5×4

0.25×36

0.125×3.2×2.5

35×40.2

8樓:芒堅鎮絲

五年級數學簡便計算練習卷

下面各題怎樣算簡便就怎樣算。

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-...五年級數學簡便計算練習卷下面各題怎樣算簡便就怎樣算。

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

4.5÷1.8

4.2÷3.5

930÷0.6÷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夠麼?

脫式計算。【過程】 1/3÷(2/3-2/5)×3/5 [1/2-(3/4-3/5)]÷7/10 8/9×[3/4-(7/16-1/4)]

9樓:匿名使用者

解:依題意得算式,

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

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