小学数学简便运算专项练习400题(附答案)

玛丽莲梦兔
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2020年12月24日 14:06
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民商法论文-日照龙鳞万点金

2020年12月24日发(作者:卓仁禧)


.
小学数学简便运算专项练习400题
第一部分(1-50题)

12.06+5.07+2.94 30.34+9.76-10.34

3
8
×3÷
3
8
×3 25

34÷4÷1.7 1.25

102×7.3÷5.1 17

1
5
9

75
13

9
11

933-15.7-4.3 41.06

7
233
5
-3
8
+
8
8

700÷14÷5 18.6

.
×7×4
÷
2
3
×0.8
3
4
7
+
17
-7
3
7

2
3
+7
2
5
+3
3
5

-19.72-20.28
455
7
+2
9
-
9

÷2.5÷0.4


.
1.96÷0.5÷4 1.06×2.5×4

1313
1717
13×
19
÷
19
29÷
27
×
27


19.68-(2.68+2.97) 5.68

19.68-(2.97+9.68) 7

5
6
7
-(
3
8
-
1
7
) 0.74

1.25×( 8 ÷0.5) 0.25

1.25×( 213×0.8) 9.3

24×(
11311
12
-
8
-
6
+
3
) (12+

0.92×1.41+0.92×8.59
.
+(5.39+4.32)
2
5
2
17
+(< br>18
-
17
)
÷(71×
74
100
)
×( 4 × 1.2)
÷(4÷
100
93
)
2
7
) ×7
16
5
×
737
13
-
5
×
13


.

99
1.3×11.6-1.6×1.3 ×11.6+18.4×
55
9999+999+99+9 4821-998

3.2×12.5×25 1.25

7.6÷0.25 3.5

1.8×99+1.8 3.8

777
25
×103-
25
×2-
25
102×0 .87 2.6

7
32
×31+
7
32



.
×88
÷0.125
×9.9+0.38
×9.6
×9.9
12
22< br>17
17
×
3
+
3
÷
5



第二部分(51-100题)
1.01


.
3333
×36 ×38
3737

13.5×27+13.5×72+13.5 1.5×7.4+0.6×150%+2÷
2


5.3×
1
4
+2.7×25% 0.67

28×21.6-2.8×16 5.6

2
1
2
×6.6+2.5×6
3
5
11
4.6+3
2
5
+6
3
5
+5.4 3
2.8+5
4
9
+7.2+3
5
9
4
7
253
5
+4
7
+2
5
53
2
3
7
+3
5
9
-3
3
7
+1
44
9
+1
7
0.75+

44444
5
+9
5
+99
5
+999
5
+9999
5
5-2
14
17
-1
3
17
48.3-15
.
3
×10.1-6.7
×1.7+0.56×83
7
8
-6
12
3
-1
3

4
15
×(
5
7

3
14
÷
3
4
)
3
8
+2.25+5
5
8
+7
3
4

6
11
-16
4
7
+16
5
11

5
8
+
1
4
+0.375
4
5
-(2
45
5
+
12
)
15
6
-4
6

4


.
51
9 ×4.25+4 ÷6 3.6×0.25
64

51353
0.625×0.5+ + ×62.5% 31 ×72 ÷31
82
2.5×(
9999
10
+
10
+
10
+
10
) 22
0.25×63.5-
1
4
×13
1
2
6
3
8
9
+3.125+1
1
9
+1
7
8
16
(111+999) ÷[56×(
3
7
-
3
8
)] 49.5
7
11
×4
14
19
+5
5
19
÷1
47
7
+
11
45
897×
3
8
-37.5%+104×0.375 3
3.5×1
174
4
+1.25×2
10
+3.8÷
5
3755+2996 8439+1001

446+295 888+999

.
8138
×
3
4
+25×75%-7×0.75
7
15
×2.5-2
17
2
×4
15

4
5
+(2
4
7
-1.8)
×10
3
5
-(50-
1
2
)×0.6
×(
7
9
+
4
15
-0.6)
1
4
×(5
3
8
-5.375)
×99 71


.
299×101 563×999

2100÷20 1125-996

6÷0.25 72
第三部分(101-150题)
25×32×125 709

0.25×48 2.5

2
13
2
×6.6+2.5×6
5
75.3

4.6×3.7+54×0.37 0.125

11
7
8
―6
12
3
―1
3
15

19.82―6.57―3.43 4.6+3
.
×156-56×72
×99+709
×
3
7
-0.4÷2
1
3

×99+75.3
×
31
4
+
8
×8.25+12.5%
3
14
―4.25―5
3
4

2
5
+6
3
5
+5.4


.
353
4+2.25+5+7 9.63÷2.5÷4
884

8.37-3.25-(1.37+1.75)
2525


3-
7
12

5
12


8
15
×
5
16
+
5
27÷
10
9
18

22
3
×7+
3
×5


544
7
×
7
+
7
)÷4
7

2
3
×7+
2
×5

3



515
12

4


6


.
3456

5355
7
×
8
+
8
×
7

×(
4
9
+
5
6


116

12
)×(24-
4
5

1
5< br>÷[(
211
3
+
5
)×
13
]
1
6

1
12
)×24-
4
5

57
9

12

5
12

95




.
(32×


31
15
1
+17)÷ (25+)÷+
4
412
44
189799455
×+×+×÷
25
16
25
1616

5
8

6

63(
5
9
4
21

3
7
)


(21×
341
7

7
×21)×
4


45
5
×
6
×
5
8



14
15
÷[(
4
5

2< br>3
)×
10
11
]

5
6
×
6
5

9
10
÷
9
5
4


1
1
1
8
×58+
8
×41+
8

.
[
511316
8
(
2

3
)
4
]
23

99+
9
10
)÷9
1
3
+3÷
1
2


5
6

4
5
)×30

57
11

11


4
5
÷[(
515
8

2
)÷
8
]


.

44514523
××- ×+÷
5
5742565

3
235 - 135÷18 ×153–0.6×53
5

第四部分(151-200题)

41777121
( + )÷ + 10 - - +
54310191919

153
25× ÷ × 13.09-8.12-4.88
3210


11310
12×103-4500÷75 ×[ ÷( × )]
8259

23
( + )×15×11 37.5+19.5÷2.5×4
1511


.


.
1125-997 998+1246

12
4+3.2+5+6.8 25×(37×8)
33

12
2
5
-(1
2
7
+2
2
5
) 400

(
1
4

1
6
)×12 1

34×(2+
13
34
) 125

4.35+4.25+3.65+3.75 3.4

17.15-8.47-1.53 17

0.125×0.25×32 22.3

(
117
12

18
+
5
24
)×72 4.25

.
÷125÷8
3
4
×2
44
15
×
7

×8.8
×99+3.4
5
6
-3
35
4
-4
6

-2.45-5.3-4.55
-3
5
6
-(2
13
6
-1
4
)


.
187.7×11-187.7

7152
÷2+×
95119
43
4533
711
×+57.125×-0.5 3 ×( - ÷ )
822

2.42÷
3
4
+4 .58×
1
1
3
-4÷3 2

11
7
8
+6
12
3
+1
3
4
4.6-3
2
5
-6
3
5
+5.4 2.8+5
4
3
8
-2.25+5
5
8
-7
3
4
7

53
6
11
-16
4
7
+16
5
11
5-2

2
3
7
+3
5
9
-3
3
7
+1
4
9
+1
4
7
0.75+

44444
5
-9
5
+99
5
-999
5
+9999
5
48.3-15

.
157144
1
2
×6.6-2.5×6
3
5

4
5
-(2
4
5
-
5
12
)
4
9
+7.2+3
5
9

2
5
+4
5
7
+2
3
3
5
14
5

143
17
-1
17

5
8
+
1
4
+0.375
15
6
-4
6


.
5144
9 ×4.25+4 ÷6 16 +(2 -1.8)
6457

513
0.625×0.5+ + ×62.5% 31 ×8
82

2.5×(
9999
10
+
10
-
10
-
10
) 22


第五部分(201-250题)
3.2×0.25﹣
4
7
÷4

15.8﹣+14.2﹣



÷( +×)

25×1.25×4

1﹣﹣
.
8
×
3
4
+25×75%+5×0.75
0.4×(3.85﹣0.4)÷13.8
8×( +)+ ;
68÷[0.5×(7.5﹣0.7)
3.75+4.1+2.35)×0.8
99×16+16





.

10÷+×18 26.35÷6.2+14.5

31.9×18﹣8×31.9 21÷(+)÷

(+)×45

12×(+﹣)

﹣15.37+﹣34.63

360÷[56×(﹣)]

80.7×8.7+8.07×13

96×


.
(1﹣×70)÷

(﹣0.125)÷0.5
24×(+﹣)
×1.7+×1.7)÷
×[﹣(﹣)]









.



10.64+4.5×3.6+11.36 7×(++)

×+÷

×(+÷)

7.32﹣(3.8+1.32)

×÷()
1880×201.1﹣187.9×2011



3.2×1.25×0.25

.
2+÷×
÷[(+)×]
0.6×24+×76
[7+(3﹣1)]×+


5.8×[1÷(2.1﹣2.09)]







.
×101﹣ 42÷(+)


×+×75% (﹣)×(+)
8.85﹣0.25﹣0.75

375+450÷18×25

14.2×25%+×

+2+3.25+3

68﹣7.5+32﹣2.5

175+25﹣112
.

第六部分(251-300题)

(51+)÷17
1.25×0.25×32
÷(1﹣﹣)
(+)×15×17
﹣(﹣)
8.02×99+8.92







.

×+×+ (+)×7×5

×(0.75﹣) +×(2.5﹣)

0.45+0.45÷0.9×1.8

25×104

(+)×10×6

2005×


÷[﹣(+)]

(×+×)×18.5

2.8×4.1+0.28×59
.
9﹣5﹣2.25
0.625×4.3+×4.7+62.5%
×20﹣×3﹣
999+99+9+
1.3﹣3.79+9.7﹣6.21
×8++4×
26.7﹣1.7×5﹣1.5








.

8×+8× 69×


1200﹣198 ÷+×

×(1÷﹣÷1)+.

1.9﹣1.9×(1.9﹣1.9)

12.25﹣0.64﹣0.36+7.75

×〔﹣(﹣)〕

÷(﹣)×(﹣)

6×0.375+0.375×3+0.375

3÷÷÷4
.
67×
0.7+3.9+4.3+6.1
3﹣÷﹣
+)×7+ .
+﹣+
4.67﹣(2.98+0.67)
76×99







.

36×(+﹣) (+÷)×

第七部分:(第301-350题)
4.05﹣1.8﹣1.2 125×32×25

(+)÷﹣ 1.25×32×2.5

+× 7.38﹣(1.57+2.38)

+×99 ÷[1÷(﹣)]

9315÷23+77 1.25×32×2.5

7.25﹣3+3.75﹣6 0.625×12.2﹣×3.2+

(×+÷)÷ 184×0.25+×15+25%
187﹣(15﹣12) 18+6.25+7+3.75
.


.

÷8+× 6.43×83.8÷6.43×6.43÷83.8÷6.43

125×8.08 86×15﹣380
79×25+20×79+79×55 [﹣(﹣)]÷4
×(﹣) ×÷
7+3+2+6 ÷7+×

2.5×0.125×80×4 . 167+289+33+11

48×125×2×8 23×52+52×77 ;

89×101 3﹣2+5﹣1

14.85﹣1.58×8+31.2÷1.2 2.25×+2.75÷1+60%

1000+999﹣998﹣997+996+99 5﹣994﹣993+…+104+103﹣102﹣101,

.


.
1.25×0.25×32 0.25×3.78×4

6.74×10.1 0.85×99

6.8×3.7+6.8×6.3

98×2.5

3.5÷8÷0.125 .

54.2﹣+4.8﹣;



第八部分(351-430题)

12×3434-34×1212 20182018

.
﹣2.8+7.4﹣7.2
÷23+×
÷13+×
3.5×+5.5×80%+0.8
×1998-19981998×2018
13.6



.
123
15731
123123
15731573

124
15741575

159


353535103
1111112002
105
2004

169

535353104
1313132003
111


47710100103

2222


35577999101

5791113151719
1

6122

11111
()()()()

8911

111
()(1)(1)()

23452342345234

1
(1)( )(1)()

232011232010
.


.
131
5[(0.131400)]

242

7.62011.4(2011.412.5)2.4


999
2
1999


66666666666666


8111199998



573697572
573697124

3636
7272


20100.31.
20120.5

2
2012


412114
7
23
13
16
7

7

13

16.251.70.751.7

.
99
97
98
49

2
9
(7.75
8
27
3.3759.253
3
8
)
1
4
17.636
4
5
2.6412.5


1


.
(
5
2009

3
2010
)20092010


1627

1
7

23
27
74

(19.213
7
19
)6.25(40.826
121< br>19
)6
4


39
148
149
148
8674
149
48
149


20112011
2011
2012



0.752.50.085757.50.1


[1328(3282.5)]1.2

(6
1
4
5.434.57
4115
25
)(1
24
< br>6
)1.44


9456.879443.486010.035

.
3
8

15
37
0.375
30
37
 38
29
37

51
253749
3

3
71
4

4
91
5

5

5
5
13
198198
1981
199
1
200
1001


.

7.152.5181.25287.15


413124
2216

9159915
(

323318
)20112012

(1517.710.75)

23
2457
51.41414
3(3)3.4

5.760.2136.37

5111711
191919190

1.566.82.41.569.20.44


91
67.854.312219%

109
561115111111
7950

76()23()53()

93762376
4.75
13

9211122
154.7515

217

322513563
7
4151515
)
860.250.625860.12586

(

999999979797
19191919
370.37 8.283.70.172

.


.

122436485101020

23466981210152030

11111


26122090

151119109


261220110
2222


177131319145151

200720082008200820072007

59< br>235.22
20060.41.6
1143
910
()< br>
2008982251020028

52 7
42554
265.22
20080.52008
950
1
(1)()(1)( )

232008232007

(

55
13571005
)33

2233
1007100910112011
111
(25 7)()

257
.


.


12
)232571

6971
2009

53
1
2008

()20072008

2007
20072008
1237
237237

239238

200.71820070.8


5545
30.250.353530.4

40.82.512.5

9999
(

1111
)

7889910789
111 11111
(46)(43)(41)(1)

78787878

1
()()()()

31

11111111


144771010131316161919222225
.


.

11111111
1357911131517

6122
133
201.2201220.12

1
+
3
+
3
+
5
+
7

9
+
10
520010
345782021
1111111 11


2486512
2009
2
2008
2


+
1112
+

2435
9999222233333334


502498


901899


20011999

2011
2
2009
2

1250
2
750
2



答案:
第一部分(1-50题)
12.06+5.07+2.94=20.07 30.34+9.76-10.34 =29.76
.


.
33
×3÷×3 =9 25×7×4 =700
88
2
3
34÷4÷1.7 = 5 1.25÷×0.8 =
3
2
3
4
3
4
102×7.3÷5.1 = 146 17+-7 =10
7
17
7
17
5752232
6
1-- = 11+7+3 =22
9139
13
3553
933-15.7-4.3 =913 41.06-19.72-20.28=1.06
72
5
-3
3
8
+
3
8
=4
2
5
8
700÷14÷5=10 18.6
1.96÷0.5÷4 =0.98 1.06
1717
13×
19
÷
19
=13 29
19.68-(2.68+2.97)=14.03 5.68
19.68-(2.97+9.68)=7.03 7
5
631
5
7
-(
8
-
7
) =5
8
0.74
1.25×( 8 ÷0.5)=20 0.25
1.25×( 213×0.8)=213 9.3
24×(
1131
12
-
8
-
6
+
1
3
)=17 (12+
0.92×1.41+0.92×8.59=9.2
1.3×11.6-1.6×1.3=13
9999+999+99+9=11106 4821-998=3823
3.2×12.5×25=1000 1.25
7.6÷0.25=30.4 3.5
1.8×99+1.8 =180 3.8
777
25
×103-
25
×2-
25
=28 1.01
102×0.87=88.74 2.6
7
32
×31+
7
32
=7
第二部分(51-100题)
33
37
×36=
33
3 7
×(37-1)=32
4
37
13.5×27+13.5×72+13.5 =1350 1.5
.
4
7
+2
5
9
-
5
9
=10
4
7

÷2.5÷0.4=18.6
×2.5×4=10.6
1313
÷
27
×
27
=29
+(5.39+4.32)=15.39
2
5
2
17
+(
18
-
17
)=7
5
18

÷(71×
74
100
)=
1
71

×( 4 × 1.2)=1.2
÷(4÷
100
93
)=40
2
7
) ×7=86
16
5
×
7
13
-
37
7
5
×
13
=
5

9
5
×11.6+18.4×
9
5
=54
×88=110
÷0.125=28
×9.9+0.38 =38
×9.6=90696
×9.9=25.74
12
17
×< br>22
17
3
+
3
÷
5

3333< br>37
×38=
37
×(37+1)=33
33
37
× 7.4+0.6×150%+2÷
2
3
=


.
5.3×
1
+2.7×25% =2.5 0.67×10.1-6.7=0.067
4
28×21.6-2.8×16=560 5.6×1.7+0.56×83=56
13712
7
2 ×6.6+2.5×6 =33 11 -6 -1 =3
25833
8
234533
7
4.6+3 +6 +5.4 =20 3 ×( - ÷ )=
55157144
5
45353
2.8+5 +7.2+3 =19 4 +2.25+5 +7 =20
99884
2535645
3
7 +4 +2 =14 53 -16 +16 =53
575711711
7
3534451
4
2 +3 -3 +1 +1 =5 0.75+ + +0.375=2
7979784
7
44444
11111
+9 +99 +999 +9999 =1-+10-+100- +1000- +10000- = 11110
55555
55555
445
7
4 -(2 + )=1
5512
12
14315
5-2 -1 =1 48.3-15 -4 =28.3
171766
51
9 ×4.25+4 ÷6 =42.5 3.6×0.25 =0.9
64
513535
0.625×0.5+ + ×62.5% =1.25 31 ×72 ÷31 = 72
82813813
99993
2.5×( + + + )=9 22× +25×75%-7×0.75=30
101010104
11717
0.25×63.5- ×13 =12.5 6 ×2.5-2 ×4 =5
4215215
81744
4
3 +3.125+1 +1 =10 16 +(2 -1.8)=17
99857
7
3331
(111+999) ÷[56×( - )]=370 49.5×10 -(50- )×0.6 =495
7852
71454774
×4 +5 ÷1 + =7 45×( + -0.6)=20
5
313
897× -37.5%+104×0.375=875 3 ×(5 -5.375) =0
848
174
3.5×1 +1.25×2 +3.8÷ =12.5 71×99=7029
4105
3755+2996=6751 8439+1001=9440
446+295=741 888+999=1887
299×101=30199 563×999=562437
2100÷20 =105 1125-996=129
6÷0.25=6×4=24 72×156-56×72=7200
第三部分(101-150题)
25×32×125=25×4×8×125=100000 709×99+709=70900
31
0.25×48=0.25×4×12=12 2.5× -0.4÷2 =0.9
73
.


.
13
2×6.6+2.5×6 =33 75.3×99+75.3=7530
25
31
4.6×3.7+54×0.37 =37 0.125×+×8.25+12.5%=1.25
48
7127333
11―6―1 =3 15―4.25―5= 5
833814414
23
19.82―6.57―3.43 =9.82 4.6+3+6+5.4=20
55
353
4+2.25+5+7=20 9.63÷2.5÷4=9.63÷(2.5×4)=0.963
884
8.37-3.25-(1.37+1.75)=2
3-
7
12

5
12

=2
8
15
×
5
16
+
5
27< br>÷
10
1
9
18
=
3
2
3
×7+
2
3
×5 =8

5444
12
7
×
7
+
7
)÷
7

7

=

515
1
12

4


6
=
2

(32×
1
4
+17)÷
5
12
=60

189799
9
25
×
16

25×
16

16
=
8
63(
5
9< br>
4
21

3
7
)
=20
(21×
3
7

41
21
7
×21)×< br>4
=
4

4
5
5
×
55
6
=
×
8
12
14
15
÷[(
4
5

2
3
)×
10
11
] =
7
10

5699
1
6
×
5

10
÷
5< br> =
2
4
.

2525
3

4

5

1
6
=
3

53555
7
×
8
+
8
×
7

=
7
×(
4
9
+
5
6
)=23
11
14
6

12
)×(24-
4
5)=1
15

1
5
÷[(
2
3
+1
5
)×
1
13
]=1
5
9
759
5
12

12

5

=
9
(25+
31
1
1
4
)÷
4

4

=103
4
4
5
×5
6
÷
5
16
8

=
15

[
511316
8
(
2

3
)
4
]
23

=0
(99+
9
10
)÷9 =11
1
10

1
3
+3÷
1
1
2

=6
3

5
6

4
5
)×30 =49

57
10
11

11
=2
11



.
114515
1
×58+×41+÷[(-)÷]=4
8
88
=12.5
5
8
2
8
1
44514523
4
××- = ×+÷
5742
14
565
5
=
3
3
235 - 135÷18 =227.5 ×153 – 0.6×53=60
5
第四部分(151-200题)
41777121
231
( + )÷ + = 10 - - + =9
54310
10
191919
19
153
25× ÷ × =1 13.09-8.12-4.88=0.09
3210
11310
12×103-4500÷75 =96 ×[ ÷( × )]
8259
2323
( + )×15×11= ×15×11+ ×15×11 =67
15111511
37.5+19.5÷2.5×4=
3
=68.7
32
1125-997 =128 998+1246 =2224
12
+3.2+5+6.8=20 25×(37×8)=7400
33
222
5
12-(1+2)=8 400÷125÷8=0.4
575
7
11344
34
(-)×12 =1 1×2×=
464157
15
13
34×(2+)=81 125×8.8 =12.5×(8+0.8)=1100
34
4
4.35+4.25+3.65+3.75=16 3.4×99+3.4=340
17.15-8.47-1.53 =7.15 17
535
1
-3-4=9
646
4
0.125×0.25×32=1 22.3-2.45-5.3-4.55=10
1175
513
++)×72=109 4.25-3-(2-1)=0
121824
664
7152
5
187.7×11-187.7=1877 ÷2+× =
95119
11
711
7
4533
43×+57.125× -0.5=50 3 ×( - ÷ )=
157144
822
5
13
3
1
2.42÷+4.58×
1
-4÷3=8 2 ×6.6-2.5×6 =0
25
3
4
75
712445
11 +6 +1 =19 4 -(2 - )=2
8335512
812
(

.


.
2345
4.6-3 -6 +5.4=0 2.8+5 +7.2+3 =19
5599
353253
3
3
4 -2.25+5 -7 =0 7 +4 +2 14 =14
884575
5
5
53
645143
3
-16 +16 =53 5-2 -1 =1
117111717
7
3534451
4
2 +3 -3 +1 +1 =5 0.75+ + +0.375=2
7979784
7
44444415
-9 +99 -999 +9999 = 9090 48.3-15 -4 =28.3
55555566
5144
4
9 ×4.25+4 ÷6= 42.5 16 +(2 -1.8)=17
6457
7
513
3
0.625×0.5+ + ×62.5% =1.25 31 ×8= (31+)×8=251
828
8
2.5×(
99993
+ - - )=0 22× +25×75%+5×0.75=39
101010104

第五部分(201-250题)
3.2×0.25﹣
15.8﹣
4
7
÷4=
23
0.4×(3.85﹣0.4)÷13.8=0.1;
25
8×(
=29
+)+=4; +14.2﹣
÷( +×)=; 68÷[0.5×(7.5﹣0.7)]=20.
25×1.25×4 =125 (3.75+4.1+2.35)×0.8=8.08
1﹣﹣ =0 99×16+16=1600
10÷+×18=30 26.35÷6.2+14.5=18.75
31.9×18﹣8×31.9=319; 21÷(+)÷
(+)×45=36; (1﹣
=35;
; ×70)÷=
12×(+﹣)=1; (﹣0.125)÷0.5=0.5.
﹣15.37+﹣34.63=50; 24×(+﹣)=11;
×1.7+
×[﹣(
×1.7)÷
﹣)]=
=;

=;
360÷[56×(﹣)]=120; (
80.7×8.7+8.07×13=807;
96×

=;
.


.
=;
=8;
10.64+4.5×3.6+11.36=38.2; 7×(

×+÷=; 2+÷×=
++
=;
=6.
)=;

×(+÷)=;
7.32﹣(3.8+1.32)=2.2;
×÷()=;
1880×201.1﹣187.9×2011=201.1
=;
3.2×1.25×0.25=1;
×101﹣=62;

×+×75%=0.75;
第六部分(251-300题)
8.85﹣0.25﹣0.75=7.85;
375+450÷18×25=1000;
14.2×25%+×=3.75;
+2+3.25+3=10;
68﹣7.5+32﹣2.5=90;
175+25﹣112=88;
×+×+=1;
×(0.75﹣)=;
0.45+0.45÷0.9×1.8=1.35;
25×104=2600;
.
÷[(+)×]=.
0.6×24+×76=60;
[7+(3﹣1)]×+=7

=25;
=648.
5.8×[1÷(2.1﹣2.09)]=580;
42÷(+)=36;
(﹣)×(+)=.
(51+)÷17=3;
1.25×0.25×32=10;
÷(1﹣﹣)=1.
(+)×15×17=47;
﹣(﹣)=.
8.02×99+8.92=802.9;
(+)×7×5=17;
+×(2.5﹣)=.
9﹣5﹣2.25=1;
0.625×4.3+×4.7+62.5%=6.25;



















.


+)×10×6=16; ×20﹣×3﹣=6.
2005×

=(2004+1)×=2004×+=2003+=2003;
999+99+9+=99 9+99+9=(999)+(99)+(9)=1000+100+10=1110;
÷[﹣(+)]=; 1.3﹣3.79+9.7﹣6.21=1.
(×+×)×18.5=16;

2.8×4.1+0.28×59=28;
8×+8×=8;
1200﹣198=1002;
×(1÷﹣÷1)+=.
1.9﹣1.9×(1.9﹣1.9)=1.9
12.25﹣0.64﹣0.36+7.75=19
×〔﹣(﹣)〕=;
÷(﹣)×(﹣)=;
6×0.375+0.375×3+0.375=3.75;

3÷÷÷4=3.
36×(+﹣)=11;
第七部分(301-350题)
4.05﹣1.8﹣1.2=1.05;
(+)÷﹣=0.
+×=;
+×99=90;
9315÷23+77=482.

.
×8++4×=7;
26.7﹣1.7×5﹣1.5=16.7.
69×=15;
÷+×=;
67×=(66+1)×=24;
0.7+3.9+4.3+6.1=15;
3﹣÷﹣=2;
(+)×7+=5.
+﹣+=1;
4.67﹣(2.98+0.67)=1.02;
76×99=7524;
(+÷)×=;
125×32×25=100000;
1.25×32×2.5=100,
7.38﹣(1.57+2.38)=3.43;
÷[1÷(﹣)]=;
1.25×32×2.5=100;

















.
7.25﹣3+3.75﹣6=1; 0.625×12.2﹣×3.2+=6.25.

(×

187﹣(15﹣12)=185; 18+6.25+7+3.75=36;

÷8+×=; 6.43×83.8÷6.43×6.43÷83.8÷6.43=1.

125×8.08=1010, 86×15﹣380=910,
79×25+20×79+79×55=7900, [﹣(﹣)]÷4=
×(﹣)=
7+3+2+6

,=20;
×÷
÷7+×
=
=



+÷)÷=; 184×0.25+×15+25%=50;
2.5×0.125×80×4=100. 167+289+33+11=500;
48×125×2×8=96000; 23×52+52×77=5200;
89×101=8989. 3﹣2+5﹣1=5;
14.85﹣1.58×8+31.2÷1.2=28.21; 2.25×+2.75÷1+60%=3.6;
1000+999﹣998﹣997+996+995 ﹣994﹣993+…+104+103﹣102﹣101,
=(1000+999﹣998﹣997 )+(996+995﹣994﹣993)+…+(104+103﹣102﹣101),
=4+4+…+4,
=4×(900÷4),
=900.
1.25×0.25×32=10; 0.25×3.78×4=3.78;
6.74×10.1=68.074; 0.85×99=84.15;
6.8×3.7+6.8×6.3=68. 13.6﹣2.8+7.4﹣7.2=11;
98×2.5=245;
3.5÷8÷0.125=3.5.
54.2﹣+4.8﹣

÷23+
÷13+×
×
=
=


=57; 3.5×+5.5×80%+0.8=8;
第八部分(351-430题)
12×3434-34×1212 =12×34×101-34×12×101=0
20182018×1998-19981998×2018 =2018×1001×1998-1998×1001×2008=0
.


.
123
123123124

123123
= 1÷(123 ÷123)=1÷【(123+)÷123】=
124
124124125

15731573

15731
15731

=1÷【(1573+)÷1573】+=1 15741575
15741573
353535103
103105
3 510101
105

159
=159×-(104+1)×=
535353104
104104
5310101
169

1111112002
2
1110101
2004
=169×+(2003+1)×= =2145
1313132003
2
1310101
111
111111133
=×(-+ -+……+-)= < br>
477
1
47710100103
3

2222
111111198

=-+-++…+-=
35577999101
3557799101303

57911 13151719
1
=1-(
1
+
1
)+ (
1
+
1
)-(
1
+
1
)+(
1
+
1
)-(
1
+
1
)+
6122
2334455667

111111113
+)-(+)+(+)=1-+= 78899102105
11111
()()()()< br>
8911
1
111
1
111
11
1111 11111

)×(

)+(+

)×-(+

)×(

)+


8
91011
8
91011
128
911
1
111
11691
< br>)×==(+


8
91011
1247520
=(
111
()(1)(1)()

23452 342345234
=(
=
1111111111

)×1+(

)×(

)-1×(

)-(
< br>)×(


234523452342342345234
1

5
1
( 1)()(1)()

232011232010
.


.
11
)×(++ …+)+(1-

…-)×-(1-

…-)

…-
2320
1111111
×(++…+)+×(++…+)
2320
11111111
=(1-

…-)×+×(++…+)
23232010
1111111111
= 1×-(++…+)×+×(++…+)=
2121
=(1-
131
5[(0.131400)]
= 110
242
7.62011.4(2011.412.5)2.4
=7.6 ×2011.4+2011.4×2.4+12.5×2.4=20145.25
999
2
1999
=999×999+999+1000=999000+1000=1000000
66666666666666
=
=2×33×3×222+2×3333×3 ×22222
=444×999+44444×9999=444×(1000-1)+44444× (10000-1)=444000-444+444440000-44444
=444884000-44888=444439512

8111199998
= 8×1111+9×8×1111=8×1111×(1+9)=88880
573697572 3636
57369757369736101
13

= +=1+=
5736971247272
22
573697124721 01
97
20100.31.2
3018
9949
=(100-
1
)×49=4899
1


=
98
20120.52012
503982
412114
283< br>2316
= 16
(7.753.3759.253)
=16
71377139278
14
16.251.70.751.7
=10
117.6362.6412.5
=100
45
(
53
)20092010
=
20196477

20092010
16123
74
=
4
×
4
+
23
×
4
=
4

27727
2772777
(19.213< br>39
71213153029
)6.25(40.826)6
= 625
0.37538
=0.75
7
1488674
148148148
14848
=39×+86×+24×=148
149149149
149149149
.


.
2 53749
517191
=(50+
5
)×
3
+ (70+
7
)×
4
+(90+
9
)×
5
= 123
334455
354759
20112011
10015
2011
20112012
=1÷【(2011+)÷2011 】=
2012
20122013
51981
1981981
= 5392
13199200
0.752.50.085757.50.1
=7.5
[1328(3282.5)]1.2
=0.5
14115
(65.434.57)(1)1.44
=62.5-(2.1-1.2)=61.6
425246
9456.879443.486010.035
=94×100.35+6 ×100.35=10035
7.152.5181.25287.15
=7.15×2.5×18-7.15×2.5×0.5×28
=7.15×2.5×(18-14)=71.5
413124
2216
= 12
9159915
323318
()20112012
=2014
(1517.710.75)
=24×
8
=8
8

23
2323
2457
51.41414
3(3)3.4< br>=
73

5.760.2136.37
=
5
+1=1
5

5111711
5
191919190
1919
1.566.8 2.41.569.20.44
=1.56×9.2+9.2×0.44=18.4
91
67.854.312219%
=
109
561115
7950
=
5
×(79
6
+10+
11
)= 50
9179917
91717
76(
=
111111
) 23()53()
=76×
1
-76×
1
+23×
1
+23×
1
-53×
1
+53×
1
23535 3762376
235353762376
111
×(76-53)-×(76-23 )+×(23+53)=1
235376
4.75
16166116
1 54.7515
= 20×
16
+20×
6
=40
1141111411
1111
1019211122
217< br>=
22
×(
10
+
1
)-
7
×11
×
1
=
22
-
11
=
11

1322513563
6365
.


.
13< br>(
4151515
860.250.625860.12586
= 100
19191919
7
17
171011710 101
194
)
=(+)÷=
999999979797
99
991019710101
99
370.378.283.70.172
= 33.3
12243648510 1020
1
122436...1020
= =
23466981210152030
3(1224 36...1020)
3
11111

=
1
+
1

1

1

1

…+
1
-
1
=
9

26122090
2
2334
91010
151119109
111111111

= 1-+1-+1-+1-+…+1-=109-(+++…+)
261220110
26122
=109-(
1111111101
+-+-+…+-)=109-=108
223 3410111111
2222
1111111150

=×(1-+ -+ -+…+-)=
17713131914515 1
3771151
200720082008200820072007
=0
1143
2008982251020028
=2008×98.25-2 25×10.04+200.8×28.75=2008×98.25-
225
×
42 554
200
2008 +2008×2.875=200800
59
5
235.22
21.32
20060.41.6
91 0
20060.80.82
()
=
9
÷()=1÷0.8= 1.25

527
5
20080.52008
20082008
265.22
21.32
9
950
1

(1 )()(1)()< br>232008232007
111
++…+)+(++…+)×(++…+)-1×(+ +…+)-(++…
232
11111
+)×(++…+)=
28
= 1×(
(
55
13571005
1
(11005)5032
)33
=2.5 == < br>2233
1007100910112011
(10072011) 5032
3
11112
(257)()()232571
=
4
=59
2576971
3
.


.
2009
53
1
2008
=
2008

()20072008
=4019
2007
20072008
2007
1237
237237
=1
200.71820070.8
=2007
239238
5545
30.250.353530.4
=9
40.82.512.5
=100
9999
(
1111
111
)
= (++)×7×8×9=24
7889910789
788991011111111
112
(46)(43)(41)( 1)
=(46+43+41+…+1)-××16=375
787
78787 878
1
()()()()

31
=(1111111
++)×(+)+(++)×-(++)×(+)-×(+)=
3451
11111111


144771010131316161919222225
=

111111118
(1-+-+-+…+-)=
344771022252511111111
1357911131517
=(1+3+5…+17 )+(
1
+
1
+…+
1
)
6122
61290
=81
2

5
+
1 33
201.2201220.12
=10120.36
1
+
3
+
3
+
5
+
7

9
+
10
520010
345782021
13357++++
34578
+(
1112
+

=
24 35
11111111

)+(

)+(

)+(

)=5

45733857
111111111
1111 111
11
511


=+ -+-+-+…+=
2486512
22448816
256512
512
20092
2008
2
=(2009+2008)×(2009-2008)=4017
9999222233333334
=3333×6666+3333×3334=33330000
502498
=(500+2)(500-2)=500²-2²=249996
901899
=(900+1)(900-1)=900²-1²=809999
.


.
20011999
=(2000+1)(2000 -1)=2000²-1²=3999999
2011
2
2009
2
= (2011+2009)(2011-2009)=4020×2=8040
1250
2
750
2
=(1250+750)(1250-750 )=2000×500=1000000



.

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