分数混合运算简算100道 (含答案)-分数混合运算题带答案

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2020年12月19日 00:03
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2020年12月19日发(作者:仲壬)



分数混合运算简算练习



一.计算题(共30小题)

1.怎样简便就怎样算.

(+)×32

×+×


﹣×





××

(+﹣)×36




2.能简算的要简便运算

(﹣)×

(1﹣×)÷




3.能简便计算的要简便计算.

×+÷4

÷(+)




59×+59×

98×



1


××

×+25%×.

(+)÷


58×﹣×31





4.下面各题,怎样简便就怎样算

101×﹣

(+ )×54 60×[÷(﹣)]




×+×

÷+×



5.脱式计算,能简便的要简便计算

27×﹣11

﹣+﹣




+×16

+++




6.下面各题,怎样简便就怎样算.

÷7+×



7÷[1÷(4﹣)]


7.下面各题能简算的要简算.



(+ )÷.




﹣+


×4+×4.


×+÷

+÷+.

2



34﹣34×




2﹣



÷





(+

﹣)×25


101×


8.计算下面各题,能简算的要简算.

×[+(﹣




)]

×9.3+9.3×2.25

(+



)×8+ 36×(+﹣)

9.怎样简便怎么计算.

×﹣÷ ( +



0.24×58+2.4×4.1+0.24
1



10.简便计算.

3

×)÷ 56 ×






÷+×.



÷(+




) ×0.75+× (+)÷

0.575×19+1.9×4.25




×+0.375×2﹣3÷

(++




)÷(++)

33÷+×44+24÷﹣0.6.
11.计算下面各题,能简便要简算,并写出过程

55÷[(﹣)×]





36×(+﹣



12.怎样算简便就怎样算

×+÷6

÷×÷

24××

×39+



98×0.2﹣89×+41×.

4







(+)×24






1﹣÷


56×


13.计算下面各题,能简便要用简便方法.

×0.375÷





48×(﹣+)




14.计算下列各题,能简算的要简算.

(﹣)×45 (+)×(1﹣)




4×0.8×2.5×12.5

15.下面各题怎样简便就怎样算.

×÷×.

÷9+×

87×.

÷(3﹣﹣)

(0.75﹣)×(+)

5



+﹣





﹣﹣






﹣(+)


+(﹣)

﹣+﹣


+++.

16.我会算(能简算的要简算):

×99+



24×(﹣+)

3.7×+2.3÷
19×

26÷



÷

÷(+)
17.计算下列各题,(能简算的要简算)

×





+)×






(﹣÷2)×


(12.5×13)×0.8


×+÷

18.用简便方法计算下面各题.

×



1.25×7.8×0.8

6
3.89﹣1.7﹣0.3






102×5.6









23×





63×(+

﹣)

1999×


×

4500÷125÷8


4.25++3.75+


+7×

0.125x38+12.5%×41+

0.38×25+6.2×2.5


19.下面各题,怎样算简便就怎样算:

÷(﹣)×




×(+)+

÷




[﹣(﹣)]÷.
20.用脱式计算(能简算的要简算).

35×(1﹣)÷ 5 4.2﹣+4.8﹣

24﹣15.6÷2.5×1.5
7







+÷+






×2.5×32

5×+3×+
0.125


21.怎样简便就怎样算

2﹣×﹣

2.5×9×1.25×4×8



×47+×47+47÷

1110÷[56×(﹣)].



22.下面各题怎样算简便就怎样算.

①3.2﹣1.05×0.6 ②4×125×8×25 ③6.78×8.5+6.78×1.5



④(87﹣75)÷2×1.5 ⑤÷[1﹣(+)].


23.下面各题怎样简便怎样算.

7×(+

)×11

48×﹣35÷

4.54+9.99×999+5.45.
8







24.计算下面各题,(能简算的要简算).

×(﹣)

÷+×6




12.05﹣2.56﹣5.44

﹣(﹣)×2.




25.递等式计算(能简算的要简算).

0.125×0.25×32

×+÷

6.6×12+0.8×66




8.05﹣375%﹣

( ﹣+)×

21.57﹣(2.57+3.38)﹣



26.计算下列各题,能简算的要简算.

﹣×﹣= +×+=

÷2+2÷=


30×(+)=

÷+×=

×+×=



9


2.62.




27.计算,能简算的要简算.

÷0.6×





87×




28.计算下面各题(能简算的要简算)

×﹣÷





29.怎样简便就怎样算

30×(



+



10

÷9+×


2﹣

÷﹣




﹣)×24﹣

(+)÷﹣





÷[(+)×2]

×3.2+5.6×0.5+1.2×50%

+)


÷+×

5﹣(÷

+)

÷﹣

×[﹣(﹣)]


(+)×8×9



2017年09月21日数学的小学数学组卷

参考答案与试题解析



一.计算题(共30小题)

1.怎样简便就怎样算.

(+)×32

×+×

××

(+﹣)×36
【解答】解:(1)(+)×32

=×32+×32

=24+20

=44;


(2)×+×

=×(+)

=×1

=;


(3)﹣×

=×(1﹣)



=;


(4)××

=××


﹣×

××

11




=;


(5)(+﹣)×36

=×36+×36﹣×36

=27+30﹣21

=57﹣21

=36;


(6)××

=××



=.



2.能简算的要简便运算

(﹣)×

(1﹣×)÷

×+25%×.

【解答】解:(1)(﹣)×

=×﹣×

=﹣

=;


(2)(1﹣×)÷



12


=(1﹣)÷



=;


(3)×+25%×

=×+×

=(+)×

=1×

=.



3.能简便计算的要简便计算.

×+÷4

÷(+)
59×+59×

98×

【解答】解:(1)×+÷4
=×+×

=×(+)

=×1

=


(2)÷(+)



=




(+)÷

58×﹣×31
13



(3)(+)÷

=÷+÷

=16+15

=31


(4)59×+59×

=59×(+)

=59×1

=59


(5)98×

=(97+1)×

=97×+

=1+

=1


(6)58×﹣×31

=(58﹣31)×

=27×

=15



4.下面各题,怎样简便就怎样算
101×﹣

(+ )×54
×+×

÷+×



60×[÷(﹣)]
+ )÷.

14




【解答】解:(1)101×﹣

=(101﹣1)×

=100×

=28;


(2)(+)×54

=×54+×54

=42+10

=52;


(3)60×[÷(﹣)]

=60×[÷]

=60×8

=480;


(4)×+×

=×(+)



=;


(5)÷+×

=×+×

=(+)×

=1×



15



=;


(6)(+


)÷

=.



5.脱式计算,能简便的要简便计算

27×﹣11

+×16

﹣+﹣

﹣+

+++

×4+×4.

【解答】解:(1)27×﹣11

=15﹣11

=4;


(2)﹣+﹣
+

=(+)﹣(
=1﹣1

=0;




(3)﹣
=+

=;


+

(4)+×16

=+12

16


=12;


(5)+++

=(+)+(+)

=1+

=1;


(6)×4+×4

=(+)×4

=×4

=.



6.下面各题,怎样简便就怎样算.
÷7+×
×+÷

7÷[1÷(4﹣)]

+÷+.

【解答】解:①÷7+×

=×+×

=×(+)



=





17




②×+
=+
=+2

=


÷


×
③7÷[1÷(4﹣)]

=
=
=
=
=
=
=

÷[÷(
÷[÷(
÷[÷
÷[×
×



﹣)]

﹣)]

]

]

④+÷+

=+×+

=+(+)

=+1

=


7.下面各题能简算的要简算.

34﹣34×
2﹣÷




(+﹣)×25

101×
18


【解答】解:(1)34﹣34×

=34×(1﹣)

=34×

=1


(2)÷×



=1


(3)÷3+×

=×+×

=(+)×



=


(4)2﹣÷﹣

=2﹣﹣

=2﹣(+)

=2﹣2

=0


(5)(+﹣)×25

=×25+×25﹣×25

=20+27.5﹣3



19



=44.5


(6)101×< br>=(100+1)×
=100×
=12+
=12







+
8.计算下面各题,能简算的要简算.

×[+(﹣ )]

×9.3+9.3×2.25

(+)×8+

36×(+﹣)

【解答】解:(1)×[+(﹣
=×[+]

=×1

=;


)]

(2)×9.3+9.3×2.25

=0.75×9.3+9.3×2.25

=(0.75+2.25)×9.3

=3×9.3

=27.9;


20



(3)(+)×8+

=×8+×8+

=6++

=6+(+)

=6+1

=7;


(4)36×(+﹣)

=36×+36×﹣36×

=12+30﹣27

=15.



9.怎样简便怎么计算.

×﹣÷ ( +×)÷
0.24×58+2.4×4.1+0.24
1

﹣﹣
【解答】解:(1)×﹣÷

=×﹣×

=(﹣)×

=2×

=;


(2)(+×)÷

=(+)÷



21

5 6×

÷+×.



=;


(3)56×

=(55+1)×

=55×+1×

=28+

=28;


(4)0.24×58+2.4×4.1+0.24

=0.24×58+0.24×41+0.24

=0.24×(58+41+1)

=0.24×100

=24;


(5)1﹣﹣

=1﹣(+)

=1﹣

=;


(6)÷+×

=×+×

=×+×

=×(+)

=×1



22


=.



10.简便计算.

÷(+)

×0.75+×

(+)÷

0.575×19+1.9×4.25

×+0.375×2﹣3÷

(++)÷(++)

33÷+×44+24÷﹣0.6.

【解答】解:(1)÷(+)


=;


(2)×0.75+×

=(+)×

=1×

=;


(3)(+)÷

=(+)×

=×+×

=+1



23


=1;


(4)0.575×19+1.9×4.25

=5.75×1.9+1.9×4.25

=(5.75+4.25)×1.9

=10×1.9

=19;


(5)×+0.375×2﹣3÷

=×+0.375×2﹣3×

=×(+2﹣3)

=×0

=0;


(6)(++)÷(++)
=(++)×5÷(++)< br>=(++)÷(++)×5
=1×5

=5;


(7)33÷+×44+24÷﹣0.6

=33×+×44+24×﹣0.6

=(33+44+24﹣1)×

=100×

=60.





24




11.计算下面各题,能简便要简算,并写出过程

55÷[(﹣)×]

×39+

36×(+﹣)

98×0.2﹣89×+41×.

【解答】解:(1)55÷[(﹣)×]

=55÷[×]

=55÷

=220;


(2)×39+

=×(39+1)

=×40

=30;


(3)36×(+﹣
=36×+36×﹣36×
=27+24﹣21

=30;






(4)98×0.2﹣89×+41×

=98×﹣89×+41×

=(98﹣89+41)×

=50×

25



=10.



12.怎样算简便就怎样算

×+÷6 ÷×
1﹣÷

÷ 2 4××
56×


(+)×24

【解答】解:(1)×+÷6

=×+×

=(+)×

=1×

=;


(2)÷×÷

=××÷

=×÷

=×4

=;


(3)24××

=24××

=14×

=10;


(4)(+)×24

=×24+×24


26



=16+4

=20;


(5)1﹣÷

=1﹣×

=1﹣

=;


(6)56×



=(57﹣1)×
=57×
=17﹣
=16


﹣1×



13.计算下面各题,能简便要用简便方法.

×0.375÷

÷(3﹣
(0.75﹣
﹣)

)×(+)

48×(﹣+)

÷9+
87×.

×

【解答】解:(1)×0.375÷

=××

27




=


(2)÷(3﹣﹣)

=÷[3﹣(+)]

=÷[3﹣1]

=÷2

=


(3)(0.75﹣)×(+)


=


(4)48×(﹣+)

=48×﹣48×+48×

=16﹣24+12

=4


(5)÷9+×

=×+×

=×(+)

=×1

=




28



(6)87×
=(86+1)×
=86×
=3+
=3







+1×
14.计算下列各题,能简算的要简算.

(﹣)×45

(+)×(1﹣)

4×0.8×2.5×12.5

×÷×.

【解答】解:(1)(﹣)×45

=×45﹣×45

=15﹣9

=6


(2)(+)×(1﹣)



=


(3)4×0.8×2.5×12.5

=(4×2.5)×(12.5×0.8)

=10×10

=100


29



(4)×÷×

=(×)×(÷)

=
=


15.下面各题怎样简便就怎样算.

+﹣

﹣﹣

﹣(+)

﹣+﹣

+﹣

+(﹣
++


+.

×1


【解答】解:(1)
=﹣

=;


(2)
=
=

﹣(+)





(3)+(﹣
=+
=






(4)﹣﹣

=﹣(+)

=﹣1

30


=;


(5)﹣+﹣

=(+)﹣(+)

=1﹣

=;


(6)+++

=(+)+(+)

=1+1

=2.



16.我会算(能简算的要简算):
×99+

24×(﹣+)

3.7×+2.3÷

19×

26÷÷

÷(+)

【解答】解:(1)×99+

=×(99+1)

=×100

=12;




31


(2)24×(﹣+)

=24×﹣24×+24×

=8﹣6+4

=2+4

=6;


(3)3.7×+2.3÷

=3.7×+2.3×

=(3.7+2.3)×

=6×

=5;


(4)19×

=

=;


(5)26÷÷

=26÷(×)

=26÷

=;


(6)÷(+)



=.



32





17.计算下列各题,(能简算的要简算)

×+×



(﹣÷2)×

( +)×

(12.5×13)×0.8

【解答】解:(1)×+×

=×(+)



=;


(2)+×

=+

=;


(3)(﹣÷2)×

=(﹣)×



=;


(4)(+)×

=×+×

=+

=;


(5)(12.5×13)×0.8


×+÷

33



=(12.5×0.8)×13

=10×13

=130;


(6)×+÷

=×+×

=×(+)

=×1

=.



18.用简便方法计算下面各题.

×+÷

1.25×7.8×0.8

102×5.6

63×(+﹣)

﹣×

4500÷125÷8

23×+7×

0.125x38+12.5%×41+

25×125×32

【解答】解:(1)×+÷

=×+×

=×(+)

=×1

=;


(2)1.25×7.8×0.8

=1.25×0.8×7.8

=1×7.8

34

3.89﹣1.7﹣0.3

1999×

4.25++3.75+

0.38×25+6.2×2.5


=7.8;


(3)3.89﹣1.7﹣0.3

=3.89﹣(1.7+0.3)

=3.89﹣2

=1.89;


(4)102×5.6

=(100+2)×5.6

=100×5.6+2×5.6

=560+11.2

=571.2;


(5)63×(+﹣)

=63×+63×﹣63×

=35+12﹣27

=47﹣27

=20;


(6)1999×

=(1998+1)×

=1998×+1×

=1997+

=1997;


(7)﹣×



35


=×(1﹣)



=;


(8)4500÷125÷8

=4500÷(125×8)

=4500÷1000

=4.5;


(9)4.25++3.75+

=(4.25+3.75)+(+)

=8+2

=10;


(10)23×+7×

=(23+7)×

=30×

=19;


(11)0.125×38+12.5%×41+

=0.125×38+0.125×41+0.125

=0.125×(38+41+1)

=0.125×80

=10;


(12)0.38×25+6.2×2.5



36



=3.8×2.5+6.2×2.5

=(3.8+6.2)×2.5

=10×2.5

=25;


(13)25×125×32

=25×125×(4×8)

=(25×4)×(125×8)

=100×1000

=100000.



19.下面各题,怎样算简便就怎样算:

÷(﹣)×

×(+)+

÷+×

[﹣(﹣)]÷.

【解答】解:(1)÷(﹣)×



=;


×

×

(2)
=
×(+)+

×+

×+
=++

=+(+)

37



=+

=



(3)÷






=(+)×
=1×
=




(4)[﹣(﹣)]÷
=[﹣





=.



20.用脱式计算(能简算的要简算).

35×(1﹣)÷
+÷+

5 4.2﹣+4.8﹣

24﹣15.6÷2.5×1.5
×2.5×32

5×+3×+
0.125


【解答】解:①35×(1﹣)÷
=
=48



②54.2﹣+4.8﹣

=(54.2+4.8)﹣(+
=59﹣2



38


=57


③24﹣15.6÷2.5×1.5

=24﹣6.24×1.5

=24﹣9.36

=14.64


④+÷+

=

=

=1+5

=6


⑤5×+3×+

=(5+3+1)×

=9×

=1


⑥0.125×2.5×32

=(0.125×8)×(2.5×4)
=1×10

=10



21.怎样简便就怎样算

2﹣×﹣

2.5×9×1.25×4×8

×47+×47+47÷



39


1110÷[56×(﹣)].

【解答】解:(1)2﹣×﹣

=2﹣﹣

=2﹣(+)

=2﹣1

=1;

(2)2.5×9×1.25×4×8

=(2.5×4)×(1.25×8)×9

=10×10×9

=900;

(3)×47+×47+47÷

=×47+×47+2×47

=(++2)×47

=3×47

=141;

(4)1110÷[56×(﹣)]

=1110÷[24﹣21]

=1110÷3

=.



22.下面各题怎样算简便就怎样算.
①3.2﹣1.05×0.6

②4×125×8×25

③6.78×8.5+6.78×1.5

④(87﹣75)÷2×1.5
⑤÷[1﹣(+)].



40



【解答】解:①3.2﹣1.05×0.6

=3.2﹣0.63

=2.57



②4×125×8×25

=(4×25)×(8×125)

=100×1000

=100000


③6.78×8.5+6.78×1.5

=6.78×(8.5+1.5)

=6.78×10

=67.8


④(87﹣75)÷2×1.5

=12÷2×1.5

=6×1.5

=9


⑤÷[1﹣(+)]

=÷[1﹣]



=



23.下面各题怎样简便怎样算.

7×(+)×11

48×﹣35÷


41



4.54+9.99×999+5.45.

【解答】解:(1)7×(+
=7×11×+
=44+70

=114;


)×11

×7×11

(2)48×
=48×
﹣35÷



﹣35×
=(48﹣35)×
=13×
=9;



(3)4.54+9.99×999+5.45

=(4.54+5.45)+9.99×999

=9.99+9.99×999

=(1+999)×9.99

=1000×9.99

=9990.



24.计算下面各题,(能简算的要简算).

×(﹣
÷+


×6

12.05﹣2.56﹣5.44

﹣(﹣)×2.

【解答】解:

(1)×(﹣)

42


=×﹣×

=1﹣

=


(2)÷+×6

=×6+×6

=()×6

=1×6

=6


(3)12.05﹣2.56﹣5.44

=12.05﹣(2.56+5.44)

=12.05﹣8

=4.05


(4)﹣(﹣)×2

=﹣(﹣)×2

=﹣×2

=﹣

=



25.递等式计算(能简算的要简算).
0.125×0.25×32

×+÷

6.6×12+0.8×66



43


8.05﹣375%﹣

(﹣+)×

21.57﹣(2.57+3.38)﹣2.62.

【解答】解:(1)0.125×0.25×32

=0.125×0.25×4×8

=(0.125×8)×(0.25×4)

=1×1

=1;


(2)×+÷

=×+×

=×(+)



=;


(3)6.6×12+0.8×66

=66×1.2+0.8×66

=66×(1.2+0.8)

=66×2

=132;


(4)8.05﹣375%﹣

=8.05﹣3.75﹣0.25

=8.05﹣(3.75+0.25)

=8.05﹣4

=4.05;




44



(5)(﹣+)×

=
=

×



(6)21.57﹣(2.57+3.38)﹣2.62

=21.57﹣2.57﹣3.38﹣2.62

=(21.57﹣2.57)﹣(3.38+2.62)

=19﹣6

=13.



26.计算下列各题,能简算的要简算.

﹣×﹣=



+×+=

÷2+2÷=

30×(+)=



÷
×


=

=

【解答】解:(1)﹣×﹣

=﹣﹣

=﹣(+)

=﹣1

=


(2)+×+

45


=+(+)

=+1

=1


(3)÷2+2÷

=×+2×

=+5

=5


(4)30×(+)

=30×+30×

=12+5

=17


(5)÷+×

=×+×

=( +)×

=


(6)×+×

=×(+)

=×2

=





46



27.计算,能简算的要简算.

÷0.6×

87×

÷9+×


2﹣÷﹣



﹣)×24﹣

(+)÷﹣
【解答】解:(1)÷0.6×



=;


(2)÷9+×

=×+×

=(+)×

=1×

=;


(3)2﹣÷﹣

=2﹣﹣

=2﹣(+)

=2﹣2

=0;


(4)87×

=(86+1)×

=86×+1×

=3+


47



=3



(5)(
=
﹣)×24﹣

×24﹣×24﹣

=14﹣9﹣

=5﹣

=4;


(6)(+)÷﹣
=
=
=


÷﹣






28.计算下面各题(能简算的要简算)

×﹣÷

÷[(+)×2]

×3.2+5.6×0.5+1.2×50%

【解答】解:(1)×﹣÷

=×﹣×

=(﹣)×

=2×

=


48



(2)÷[(+)×2]

=÷[×2+×2]

=÷[


=




]

(3)×3.2+5.6×0.5+1.2×50%

=0.5×3.2+5.6×0.5+1.2×0.5,

=0.5×(3.2+5.6+1.2),

=0.5×10,

=5



29.怎样简便就怎样算

30×(

+)



÷+×

5﹣(÷+)

×[﹣(﹣)]

(+)×8×9

【解答】解:(1)30×(+)

=30×+30×

=12+5

=17


(2)÷+×

=
=

49

+


(3)5﹣(÷+)

=5﹣(4+)

=5﹣4

=


(4)+÷﹣

=+﹣

=﹣

=


(5)×[﹣(﹣)]

=×[﹣]



=


(6)(+)×8×9

=×9×8+×8×9

=24+27

=51



30.计算(能简算的要简算).
×(÷)
(+)×24

(+)÷+


50





(+﹣)×54

××16

28×.

【解答】解:(1)×(÷)



=;


(2)(+)×24

=×24+×24

=18+15

=33;


(3)(+)÷+

=÷+

=+

=;


(4)(+﹣)×54

=×54+×54﹣×54

=18+9﹣6

=27﹣6

=21;


(5)××16



51


=

=;


(6)28×

=(27+1)×

=27×+1×
=5+

=5.





52

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