300道分数混合运算1有答案.docx

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300道分数混合运算1有答案.docx

300道分数混合运算1有答案

分数混合运算1

 

一.计算题(共50小题)

1.计算下面各题,能简算的要写出简算过程.

×32×

12×[(﹣)×3]

÷50+÷

×2014﹣×2015

﹣(+)﹣

×+×

2.计算.

8﹣×÷4÷+×4×(÷+)60×(﹣+)

3.直接写出得数.

+=

×17×4=

÷=

10﹣=

2÷1%﹦

8÷=

×2÷2×=

100÷1%=

12×(+)=

×99+=

4.直接写出计算结果

1%﹣%=

×5=

﹣(﹣)=

+﹣+=

÷÷×=

×÷×=

48×+3÷7=

+++++=

5.下面各题怎样算简便就怎样算.

+﹣+

6÷﹣÷6

(+﹣)÷

×﹣÷13

﹣×

×[÷(﹣)]

6.计算下面各题打星号的要简算.

×﹣÷23

×[÷(﹣)]

※(+)×29×23

※×+÷5+.

7.正确合理地计算下面各题

÷×(﹣)

7﹣(2+1)×

15﹣﹣

2×+7×9

××250

3×+7÷9×5+÷.

8.脱式计算(能简算的要简算,并写出主要过程)

1125﹣997

109×101

(+++)×25

×﹣×

(+﹣)÷

[﹣(+)]×.

9.下面各题,怎样算简便就怎样算

﹣×

(+)÷

+×+

21÷(+)÷

×﹣÷

×[÷(﹣)].

10.脱式计算,能简算的要简算.

①×8÷×8

②﹣﹣

③24×(+﹣)

④×[﹣(﹣)].

11.用你喜欢的方法计算.

①+++

②(++)×36

③2﹣×

④(+)÷﹣.

12.用你喜欢的方法计算下面各题.

﹣+﹣

(+)×8+

[﹣(﹣)]÷

×+×

(++)×72

+++.

13.脱式计算(能简便的要用简便方法计算)

(1)36+64×85+15

(2)×9×25

(3)61×40%+38×+

(4)2475÷45+2475÷55

(5)(15﹣14×)×

(6)+﹣+.

14.选择合适的方法计算.

×+÷

×99+

(+)÷

÷[×(+)].

15.计算下面各题.

105×(++)

(3618÷18﹣145)×29

﹣÷(+)

﹣+﹣.

16.用你喜欢的方法计算.

①﹣+﹣

②(++)×36

③2﹣×

④(+)÷﹣.

17.能用简便方法的要用简便方法.

(+×)÷

[﹣(﹣)]÷

(+)××

×﹣×25%

﹣﹣(﹣)

×+×+×981.

18.脱式计算.

(+)×24

67÷÷

68×35﹣408÷24

÷×

(﹣50%)÷(×42)

(+)÷×.

19.直接写出得数

+=

10÷=

÷=

a×=

×=

××=

8×+8×=

55×÷=

×÷×=

0×+=

20.用递等式计算.

÷×

(1﹣×)÷

48048÷12+88

9÷(﹣)×3.

21.能简便计算的要用简便方法计算.

﹣(+)

+++

3﹣﹣

+++.

22.计算下面各题,能够简算的要简算.

×21×

(﹣)×12

×2+×2

16×25%+16×.

23.直接写出得数.

××8=

100﹣99%=

÷=

×=

﹣×0=

3×÷3×=

+8=

÷=

24.直接写出得数.

+=

×+=

2×32=

×4%=

÷=

5﹣5×=

60%×=

×(﹣)=

25.计算下面各题,能简算的要简算.

(15﹣14×)×

101×

×﹣÷.

26.计算,能简便的要简便计算

×+÷6

÷+÷

×+×

(+﹣)×24

÷5+5÷

56×.

27.直接写得数

×16=

12÷=

0×+=

×÷×=

+﹣+

28×(+)=

28.计算

(1+0÷)÷

+8+

×.

29.能简算的要简算.

+++

×

45×21﹣50×

+++

++﹣

﹣(﹣)

××80×

×+×.

30.计算下面各题,能用简便算法的要用简便算法.

(1)×÷

(2)﹣÷×

(3)÷+×

(4)20÷〔(+)×〕

31.计算下面各题.

39××

﹣+

×+

1÷(÷)

(﹣)×24

÷[(﹣)÷].

32.

直接写出得数.

×0×6=

5﹣=

+×2=

×÷×=

9π=

6÷26=

50%﹣=

÷20%=

2+30%=

6=

33.下面各题怎样简便就怎样算.

×99+    

105×(+)

﹣﹣

+×﹣

+×+

×18﹣.

34.计算下面各题,能简算的要简算

﹣(+)

++

+﹣

﹣﹣

6﹣(﹣)

﹣++

﹣(﹣)

+﹣+.

35.

直接写出得数.

×20%=

×12=

﹣=

1÷×=

=

=

÷=

×3÷×3=

36.下面各题,怎样算简便就怎么算

÷15×

÷(﹣)×

×+÷8.

37.能简算的要简算.

+++

﹣(+)

+++

4﹣﹣.

38.脱式计算(写出必要的计算过程,能简算的要简算)

(1)

(2)

(3)

(4)

(5)

(6).

39.计算下面各题,能简算的要简算

1﹣÷﹣

3+×÷

÷(﹣)×

[1÷(+)]

×+÷

++.

40.计算(写出计算过程)

+﹣

1﹣(+)

×

÷6.

32×.

÷.

41.脱式计算

(﹣)×24

15÷15×

2÷(+)

42.直接写得数.

1÷=

÷2=

×4=

﹣×=

÷=

9÷=

×3=

×=

43.脱式计算

﹣﹣

+﹣

(1﹣(+)

÷[×(﹣)].

44.用递等式计算.

①×+÷

②+÷

③(2+)÷(2﹣)

④÷[×(+)].

45.下面各题怎样简便就怎样算.

÷×

÷×÷

×+×

×99+

(+)×32

17×.

46.下面各题写出必要的计算过程

××

×4÷

÷÷.

47.计算下面各题.

××

4×÷

﹣+﹣

(+)×21.

48.怎样简便就怎样算.

﹣÷

×35+65÷4

(+)÷

25﹣÷

÷3×

(+÷)×.

49.计算下面各题,怎样简便就怎样算

×÷

×7+×11

×99+

÷÷

(+)÷

48×

50.计算题

(1)×

(2)12×(﹣)

(3)×5÷×5

(4)+÷()

 

分数混合运算1

参考答案与试题解析

 

一.计算题(共50小题)

1.计算下面各题,能简算的要写出简算过程.

×32×

12×[(﹣)×3]

÷50+÷

×2014﹣×2015

﹣(+)﹣

×+×

【解答】解:

(1)×32×

=×(4×8)×

=(×8)×(4×)

=100×1

=100;

(2)12×[(﹣)×3]

=12××3﹣12××3]

=66﹣24

=42;

(3)÷50+÷

=×+×

=×+×

=(+)×

=1×

=;

(4)×2014﹣×2015

=×(2014﹣2015)

=×(﹣1)

=﹣;

(5)﹣(+)﹣

=﹣﹣﹣

=(﹣)﹣(+)

=12﹣10

=2;

(6)×+×

=×+×

=(+)×

=10×

=.

 

2.计算.

8﹣×÷4÷+×4×(÷+)60×(﹣+)

【解答】解:

(1)8﹣×÷4

=8﹣÷4

=8﹣

=7;

(2)÷+×4

=3+

=;

(3)×(÷+)

=×(+)

=;

(4)60×(﹣+)

=60×﹣60×+60×

=45﹣40+24

=5+24

=29.

 

3.直接写出得数.

+=

×17×4=

÷=

10﹣=

2÷1%﹦

8÷=

×2÷2×=

100÷1%=

12×(+)=

×99+=

【解答】解:

+=

×17×4=17

÷=12

10﹣=

2÷1%﹦200

8÷=10

×2÷2×=

100÷1%=10000

12×(+)=5

×99+=90

 

4.直接写出计算结果

1%﹣%=

×5=

﹣(﹣)=

+﹣+=

÷÷×=

×÷×=

48×+3÷7=

+++++=

【解答】解:

1%﹣%=%

×5=

﹣(﹣)=

+﹣+=

÷÷×=

×÷×=

48×+3÷7=21

+++++=

 

5.下面各题怎样算简便就怎样算.

+﹣+

6÷﹣÷6

(+﹣)÷

×﹣÷13

﹣×

×[÷(﹣)]

【解答】解:

(1)+﹣+

=(+)﹣(﹣)

=17﹣5

=12;

(2)6÷﹣÷6

=10﹣

=9;

(3)(+﹣)÷

=(+﹣)×12

=×12+×12﹣×12

=3+2﹣4

=1;

(4)×﹣÷13

=×﹣×

=(﹣)×

=;

(5)﹣×

=﹣

=;

(6)×[÷(﹣)]

=×[÷]

=4.

 

6.计算下面各题打星号的要简算.

×﹣÷23

×[÷(﹣)]

※(+)×29×23

※×+÷5+.

【解答】解:

①×﹣÷23

=﹣

=

②×[÷(﹣)]

=×[÷()]

=×[]

=×[×12]

=4

③(+)×29×23

=×29×23+×29×23

=46+87

=133

④×+÷5+

=×+×

=(+1)×

=2×

=

 

7.正确合理地计算下面各题

÷×(﹣)

7﹣(2+1)×

15﹣﹣

2×+7×9

××250

3×+7÷9×5+÷.

【解答】解:

(1)÷×(﹣)

=÷×

=;

(2)7﹣(2+1)×

=7﹣3×

=7﹣2

=5;

(3)15﹣﹣

=15﹣(+)

=15﹣10

=5;

(4)2×+7×9

=2×+7×

=(2+7)×

=10×

=;

(5)××250

=×(×)×250

=(×)×(×250)

=1×100

=100;

(6)3×+7÷9×5+÷

=3×+×5+

=(3+5+1)×

=9×

=7.

 

8.脱式计算(能简算的要简算,并写出主要过程)

1125﹣997

109×101

(+++)×25

×﹣×

(+﹣)÷

[﹣(+)]×.

【解答】解:

(1)1125﹣997

=1125﹣(1000﹣3)

=1125﹣1000+3

=125+3

=128;

(2)109×101

=109×(100+1)

=109×100+109×1

=10900+109

=11009;

(3)(+++)×25

=(×4)×25

=×(4×25)

=×100

=160;

(4)×﹣×

=×﹣×

=(﹣)×

=;

(5)(+﹣)÷

=(+﹣)×36

=×36+×36﹣×36

=16+30﹣14

=46﹣14

=32;

(6)[﹣(+)]×

=[﹣]×

=.

 

9.下面各题,怎样算简便就怎样算

﹣×

(+)÷

+×+

21÷(+)÷

×﹣÷

×[÷(﹣)].

【解答】解:

(1)﹣×

=﹣

=;

(2)(+)÷

=;

(3)+×+

=++

=+(+)

=+1

=1;

(4)21÷(+)÷

=21÷÷

=21÷(×)

=21÷

=35;

(5)×﹣÷

=×﹣×

=×(﹣)

=×1

=;

(6)×[÷(﹣)]

=×[÷]

=.

 

10.脱式计算,能简算的要简算.

①×8÷×8

②﹣﹣

③24×(+﹣)

④×[﹣(﹣)].

【解答】解:

①×8÷×8

=(÷)×(8×8)

=1×64

=64;

②﹣﹣

=﹣(+)

=﹣9

=;

③24×(+﹣)

=24×+24×﹣24×

=6+20﹣21

=26﹣21

=5;

④×[﹣(﹣)]

=×[﹣+]

=×[+﹣]

=×[1﹣]

=.

 

11.用你喜欢的方法计算.

①+++

②(++)×36

③2﹣×

④(+)÷﹣.

【解答】解:

①+++

=(+)+(+)

=11+10

=21;

②(++)×36

=×36+×36+×36

=9+6+15

=15+15

=30;

③2﹣×

=2﹣

=;

④(+)÷﹣

=÷﹣

=﹣

=.

 

12.用你喜欢的方法计算下面各题.

﹣+﹣

(+)×8+

[﹣(﹣)]÷

×+×

(++)×72

+++.

【解答】解:

(1)﹣+﹣

=(+)﹣(+)

=40﹣20

=20;

(2)(+)×8+

=(×8+×8)+

=3++

=3+(+)

=3+1

=4;

(3)[﹣(﹣)]÷

=[﹣]÷

=;

(4)×+×

=×(+)

=×3

=;

(5)(++)×72

=×72+×72+×72

=30+8+27

=65;

(6)+++

=(+)+(+)

=1+1

=2.

 

13.脱式计算(能简便的要用简便方法计算)

(1)36+64×85+15

(2)×9×25

(3)61×40%+38×+

(4)2475÷45+2475÷55

(5)(15﹣14×)×

(6)+﹣+.

【解答】解:

(1)36+64×85+15

=36+5440+15

=5476+15

=5491;

(2)×9×25

=×25×9

=10×9

=90;

(3)61×40%+38×+

=61×+38×+

=(61+38+1)×

=100×

=40;

(4)2475÷45+2475÷55

=55+45

=100;

(5)(15﹣14×)×

=(15﹣8)×

=7×

=;

(6)+﹣+

=(﹣)+(+)

=1+10

=11.

 

14.选择合适的方法计算.

×+÷

×99+

(+)÷

÷[×(+)].

【解答】解:

(1)×+÷

=+

=;

(2)×99+

=×(99+1)

=×100

=16;

(3)(+)÷

=28;

(4)÷[×(+)]

=÷[×]

=.

 

15.计算下面各题.

105×(++)

(3618÷18﹣145)×29

﹣÷(+)

﹣+﹣.

【解答】解:

(1)105×(++)

=105×+105×+105×

=15+70+42

=127;

(2)(3618÷18﹣145)×29

=(201﹣145)×29

=56×29

=1624;

(3)﹣÷(+)

=﹣÷

=﹣9

=;

(4)﹣+﹣

=(+)﹣(+)

=20﹣11

=9.

 

16.用你喜欢的方法计算.

①﹣+﹣

②(++)×36

③2﹣×

④(+)÷﹣.

【解答】解:

①﹣+﹣

=(+)﹣(+)

=40﹣20

=20

②(++)×36

=×36+×36+×36

=9+6+15

=30

③2﹣×

=2﹣

=1

④(+)÷﹣

=÷﹣

=﹣

=

 

17.能用简便方法的要用简便方法.

(+×)÷

[﹣(﹣)]÷

(+)××

×﹣×25%

﹣﹣(﹣)

×+×+×981.

【解答】解:

(1)(+×)÷

=(+)÷

=;

(2)[﹣(﹣)]÷

=[﹣+]÷

=[+﹣]÷

=[1﹣]÷

=;

(3)(+)××

=××+××

=+

=4;

(4)×﹣×25%

=×﹣×

=(﹣)×

=;

(5)﹣﹣(﹣)

=﹣﹣+

=(+)﹣(+)

=7﹣3

=4;

(6)×+×+×981

=×+5×+×

=×(+5+)

=×10

=.

 

18.脱式计算.

(+)×24

67÷÷

68×35﹣408÷24

÷×

(﹣50%)÷(×42)

(+)÷×.

【解答】解:

(1)(+)×24

=×24+×24

=20+9

=29;

(2)67÷÷

=67÷(×)

=67÷1

=67;

(3)68×35﹣408÷24

=2380﹣17

=2363;

(4)÷×

=××

=4×

=7;

(5)(﹣50%)÷(×42)

=(﹣)÷(×42)

=÷30

=;

(6)(+)÷×

=÷×

=74×

=37.

 

19.直接写出得数

+=

10÷=

÷=

a×=

×=

××=

8×+8×=

55×÷=

×÷×=

0×+=

【解答】解:

+=

10÷=25

÷=

a×=b

×=

××=

8×+8×=4

55×÷=40

×÷×=

0×+=

 

20.用递等式计算.

÷×

(1﹣×)÷

48048÷12+88

9÷(﹣)×3.

【解答】解:

(1)÷×

=2;

(2)(1﹣×)÷

=(1﹣)÷

=;

(3)48048÷12+88

=4004+88

=4092;

(4)9÷(﹣)×3

=9÷×3

=81×3

=243.

 

21.能简便计算的要用简便方法计算.

﹣(+)

+++

3﹣﹣

+++.

【解答】解:

(1)﹣(+)

=﹣﹣

=1﹣

=;

(2)+++

=(+)+(+)

=2+1

=3;

(3)3﹣﹣

=3﹣(+)

=3﹣1

=1;

(4)+++

=(1﹣)+(﹣)+(﹣)+(﹣)

=1﹣+﹣+﹣+﹣

=1﹣

=.

 

22.计算下面各题,能够简算的要简算.

×21×

(﹣)×12

×2+×2

16×25%+16×.

【解答】解:

(1)×21×

=15×

=

(2)(﹣)×12

=×12﹣×12

=9﹣4

=5

(3)×2+×2

=(+)×2

=1×2

=2

(4)16×25%+16×

=4+4

=8

 

23.直接写出得数.

××8=

100﹣99%=

÷=

×=

﹣×0=

3×÷3×=

+8=

÷=

【解答】解:

××8=15

100﹣99%=

÷=

×=

﹣×0=

3×÷3×=

+8=

÷=

 

24.直接写出得数.

+=

×+=

2×32=

×4%=

÷=

5﹣5×=

60%×=

×(﹣)=

【解答】解:

+=

×+=

2×32=18

×4%=

÷=5

5﹣5×=4

60%×=

×(﹣)=0

 

25.计算下面各题,能简算的要简算.

(15﹣14×)×

101×

×﹣÷.

【解答】解:

=

=;

②(15﹣14×)×

=(15﹣8)×

=

=;

③101×

=(100+1)×

=

=

=;

④×﹣÷

=

=()×

=2×

=.

 

26.计算,能简便的要简便计算

×+÷6

÷+÷

×+×

(+﹣)×24

÷5+5÷

56×.

【解答】解:

(1)×+÷6

=×+×

=(+)×

=1×

=;

(2)÷+÷

=+×4

=

=;

(3)×+×

=(+)×

=1×

=;

(4)(+﹣)×24

=×24+×24﹣×24

=16+4﹣3

=17;

(5)÷5+5÷

=×+5×

=+9

=9;

(6)56×

=(57﹣1)×

=57×﹣

=17﹣

=16.

 

27.直接写得数

×16=

12÷=

0×+=

×÷×=

+﹣+

28×(+)=

【解答】解:

×16=12

12÷=20

0×+=

×÷×=

+﹣+=

28×(+)=19

 

28.计算

(1+0÷)÷

+8+

×.

【解答】解:

(1)(1+0÷)÷

=(1+0)÷

=1÷

=;

(2)+8+

=++8

=1+8

=9;

(3)×=.

 

29.能简算的要简算.

+++

×

45×21﹣50×

+++

++﹣

﹣(﹣)

××80×

×+×.

【解答】解:

(1)+++

=(+)+(+)

=1+

=1;

(2)×

=(8+)×

=8×+×

=10+1

=11;

(3)45×21﹣50×

=45×21﹣5×21

=(45﹣5)×21

=40×21

=840;

(4)+++

=(+)+(+)

=1+1

=2;

(5)++﹣

=(+)+(﹣)

=1+

=1;

(6)﹣(﹣)

=﹣+

=+﹣

=1﹣

=;

(7)××80×

=(×80)×(×)

=100×1

=100;

(8)×+×

=×+×

=×(+)

=×10

=.

 

30.计算下面各题,能用简便算法的要用简便算法.

(1)×÷

(2)﹣÷×

(3)÷+×

(4)20÷〔(+)×〕

【解答】解:

(1)×÷

=;

(2)﹣÷×

=﹣2×

=﹣

=;

(3)÷+×

=×+×

=(+)×

=1×

=;

(4)20÷[(+)×]

=20÷[×]

=20÷

=80.

 

31.计算下面各题.

39××

﹣+

×+

1÷(÷)

(﹣)×24

÷[(﹣)÷].

【解答】解:

(1)39××

=39××

=6×

=;

(2)﹣+

=+

=;

(3)×+

=+

=;

(4)1÷(÷)

=1÷

=;

(5)(﹣)×24

=×24﹣×24

=10﹣4

=6;

(6)÷[(﹣)÷]

=÷[÷]

=.

 

32.

直接写出得数.

×0×6=

5﹣=

+×2=

×÷×=

9π=

6÷26=

50%﹣=

÷20%=

2+30%=

6=

【解答】解:

×0×6=0

5﹣=4

+×2=

×÷×=

9π=

6÷26=

50%﹣=

÷20%=4

2+30%=

6=

 

33.下面各题怎样简便就怎样算.

×99+    

105×(+)

﹣﹣

+×﹣

+×+

×18﹣.

【解答】解:

(1)×99+

=×(99+1)

=×100

=370;

(2)105×(+)

=105×+105×

=35+21

=56;

(3)﹣﹣

=﹣(+)

=﹣4

=;

(4)+×﹣

=+﹣

=﹣

=;

(5)+×+

=++

=+(+)

=+1

=1;

(6)×18﹣

=×(18﹣1)

=×17

=15.

 

34.计算下面各题,能简算的要简算

﹣(+)

++

+﹣

﹣﹣

6﹣(﹣)

﹣++

﹣(﹣)

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