[-|98|+76+(-87)]23[56+(-75)-(7)]-(8+4+3)
5+218/2-6-59
68/21-8-118+61
-2/9-7/9-56
46-(-3/4+16-4-3/4)
1/2+3+5/6-7/12
[2/3-4-1/4(-04)]/1/3+2
22+(-4)+(-2)+43
-28-81/2+8/1/8
(2/3+1/2)/(-1/12)(-12)
(-28)/(-6+4)+(-1)
2/(-2)+0/7-(-8)(-2)
(1/4-5/6+1/3+2/3)/1/2
18-6/(-3)(-2)
(5+3/88/30/(-2)-3
(-84)/2(-3)/(-6)
1/2(-4/15)/2/3
-3x+2y-5x-7y
39+[-23]+0+[-16]= 0
[-18]+29+[-52]+60= 19
[-3]+[-2]+[-1]+0+1+2= -3
[-301]+125+301+[-75]= 50
[-1]+[-1/2]+3/4+[-1/4]= -1
[-7/2]+5/6+[-05]+4/5+19/6= 125
[-2654]+[-614]+1854+614= -8
1125+[-17/5]+[-1/8]+[-06]= -3
125(-3)+70(-5)+5(-3)+25
299993+10111(101-92)
3(23/4-3/4)(36+2)
4 3/7 × 49/9 - 4/3
5 8/9 × 15/36 + 1/27
6 12× 5/6 – 2/9 ×3
7 8× 5/4 + 1/4
8 6÷ 3/8 – 3/8 ÷6
9 4/7 × 5/9 + 3/7 × 5/9
10 5/2 -( 3/2 + 4/5 )
11 7/8 + ( 1/8 + 1/9 )
12 9 × 5/6 + 5/6
13 3/4 × 8/9 - 1/3
14 7 × 5/49 + 3/14
15 6 ×( 1/2 + 2/3 )
16 8 × 4/5 + 8 × 11/5
17 31 × 5/6 – 5/6
18 9/7 - ( 2/7 – 10/21 )
19 5/9 × 18 – 14 × 2/7
20 4/5 × 25/16 + 2/3 × 3/4
21 14 × 8/7 – 5/6 × 12/15
22 17/32 – 3/4 × 9/24
23 3 × 2/9 + 1/3
24 5/7 × 3/25 + 3/7
25 3/14 ×× 2/3 + 1/6
26 1/5 × 2/3 + 5/6
27 9/22 + 1/11 ÷ 1/2
28 5/3 × 11/5 + 4/3
29 45 × 2/3 + 1/3 × 15
30 7/19 + 12/19 × 5/6
31 1/4 + 3/4 ÷ 2/3
32 8/7 × 21/16 + 1/2
33 101 × 1/5 – 1/5 × 21
3450+160÷40
35120-144÷18+35
36347+45×2-4160÷52
37(58+37)÷(64-9×5)
3895÷(64-45)
39178-145÷5×6+42
40812-700÷(9+31×11)
4185+14×(14+208÷26)
43120-36×4÷18+35
44(58+37)÷(64-9×5)
45(68-68×055)÷85
46012× 48÷012×48
47(32×15+25)÷16
486-16÷4= 538+785-537=
4972÷08-12×5= 6-119×3-043=
5065×(48-12×4)=
5158×(387-013)+42×374
523252-(6+9728÷32)×25
53[(71-56)×09-115] ÷25
5454÷[26×(37-29)+062]
5512×6÷(12-72)-6
5612×6÷72-6
57068×19+032×19
5858+370)÷(64-45)
59420+580-64×21÷28
60136+6×(65-345÷23)
15-1075×04-57
62181+(3-0299÷023)×1
63(68-68×055)÷85
64012× 48÷012×48
65(32×15+25)÷16
6632×6+(15+25)÷16
67068×19+032×19
681015-1075×04-57
6958×(387-013)+42×374
703252-(6+9728÷32)×25
71[(71-56)×09-115] ÷25
7254÷[26×(37-29)+062]
7312×6÷(12-72)-6
7412×6÷72-6
753302-(1484-9085)÷25
1) 76(25%-695%-12%)36
77/43/5+3/42/5
781-1/4+8/9/7/9
79+1/6/3/24+2/21
80/153/5
813/4/9/10-1/6
82/3+1/2)/5/6-1/3]/1/7
83/5+3/5/2+3/4
84(2-2/3/1/2)]2/5
85+526832-2569
863+456-528
875%+6325
88/2+1/3+1/4
2) 89+456-78
3) 5%+ 3/7 × 49/9 - 4/3
4) 9 × 15/36 + 1/27
5) 2× 5/6 – 2/9 ×3
6) 3× 5/4 + 1/4
7) 94÷ 3/8 – 3/8 ÷6
8) 95/7 × 5/9 + 3/7 × 5/9
9) 6/2 -( 3/2 + 4/5 )
10) 8 + ( 1/8 + 1/9 )
11) 8 × 5/6 + 5/6
12) 1/4 × 8/9 - 1/3
13) 10 × 5/49 + 3/14
14) 15 ×( 1/2 + 2/3 )
15) 2/9 × 4/5 + 8 × 11/5
16) 31 × 5/6 – 5/6
17) 4/7 - ( 2/7 – 10/21 )
18) 19 × 18 – 14 × 2/7
19) 5 × 25/16 + 2/3 × 3/4
20) 4 × 8/7 – 5/6 × 12/15
21) 7/32 – 3/4 × 9/24
22) 1、 2/3÷1/2-1/4×2/5
2、 2-6/13÷9/26-2/3
3、 2/9+1/2÷4/5+3/8
4、 10÷5/9+1/6×4
5、 1/2×2/5+9/10÷9/20
6、 5/9×3/10+2/7÷2/5
7、 1/2+1/4×4/5-1/8
8、 3/4×5/7×4/3-1/2
9、 23-8/9×1/27÷1/27
10、 8×5/6+2/5÷4
11、 1/2+3/4×5/12×4/5
12、 8/9×3/4-3/8÷3/4
13、 5/8÷5/4+3/23÷9/11
23) 12×25+08×25
24) 89×125-09×125
25) 125×74×08
26) 99×64-(25+024)(27) 65×95+65×05
035×16+035×34
025×86×4
672-328-172
045+637+455
54+69×3-(25-25)2×41846-620-380
48×46+48×54
08+08×25
125×36×8×25-125×24
28×125-125×20
2365-(307+365)
(4+04×025)8×7×125
165×99+165
2785-(785+34)
48×125+50×125×02×8
78×99+078
(1010+309+4+681+6)×12
3×9146×782×6×854
515×7/8+61-060625
1 3/7 × 49/9 - 4/3
2 8/9 × 15/36 + 1/27
3 12× 5/6 – 2/9 ×3
4 8× 5/4 + 1/4
5 6÷ 3/8 – 3/8 ÷6
6 4/7 × 5/9 + 3/7 × 5/9
7 5/2 -( 3/2 + 4/5 )
8 7/8 + ( 1/8 + 1/9 )
9 9 × 5/6 + 5/6
10 3/4 × 8/9 - 1/3
11 7 × 5/49 + 3/14
12 6 ×( 1/2 + 2/3 )
13 8 × 4/5 + 8 × 11/5
14 31 × 5/6 – 5/6
15 9/7 - ( 2/7 – 10/21 )
16 5/9 × 18 – 14 × 2/7
17 4/5 × 25/16 + 2/3 × 3/4
18 14 × 8/7 – 5/6 × 12/15
19 17/32 – 3/4 × 9/24
20 3 × 2/9 + 1/3
21 5/7 × 3/25 + 3/7
22 3/14 × 2/3 + 1/6
23 1/5 × 2/3 + 5/6
24 9/22 + 1/11 ÷ 1/2
25 5/3 × 11/5 + 4/3
26 45 × 2/3 + 1/3 × 15
27 7/19 + 12/19 × 5/6
28 1/4 + 3/4 ÷ 2/3
29 8/7 × 21/16 + 1/2
30 101 × 1/5 – 1/5 × 21
3150+160÷40 (58+370)÷(64-45)
32120-144÷18+35
33347+45×2-4160÷52
34(58+37)÷(64-9×5)
3595÷(64-45)
36178-145÷5×6+42 420+580-64×21÷28
37812-700÷(9+31×11) (136+64)×(65-345÷23)
3885+14×(14+208÷26)
39(284+16)×(512-8208÷18)
40120-36×4÷18+35
41(58+37)÷(64-9×5)
42(68-68×055)÷85
43012× 48÷012×48
44(32×15+25)÷16 (2)32×(15+25)÷16
456-16÷4= 538+785-537=
4672÷08-12×5= 6-119×3-043=
4765×(48-12×4)= 068×19+032×19
481015-1075×04-57
4958×(387-013)+42×374
503252-(6+9728÷32)×25
51[(71-56)×09-115] ÷25
5254÷[26×(37-29)+062]
5312×6÷(12-72)-6 (4)12×6÷72-6
102×(-45)-(-3)×(-5) ÷2
78×69+22×69
(-2)+2-(-52)×(-1) ×5+87÷(-3)×(-1)
56×0258×(20-125)
(-71) ×〔(-3)×(-5)〕÷2
-25×(-48)×(009)÷(-027)
127+352+73+44×(-2)
89×276+(-135)-33
25×71+75÷29 -88÷(-2)
243+89+111+57
9405-2940÷28×21
920-1680÷40÷7
690+47×52-398
148+3328÷64-75
360×24÷32+730
2100-94+48×54
51+(2304-2042)×23
4215+(4361-716)÷81
(247+18)×27÷25
36-720÷(360÷18)
1080÷(63-54)×80
(528+912)×5-6178
8528÷41×38-904
264+318-8280÷69
(174+209)×26- (9000^0)
814-(278+322)÷15
1406+735×9÷45
3168-7828÷38+504
796-5040÷(630÷7)
285+(3000-372)÷36
1+5/6-19/12
3x(-9)+7x(-9)
(-54)x1/6x(-1/3)
1181+(3-0299÷023)×1
2(68-68×055)÷85
3012× 48÷012×484
32×15+25÷(-16)
(-2)×32×(15+25)÷16
56-16÷4+(68-9)
538+785-537÷89
672÷08-12×5
6-119×3-043
765×(48-12×4)
068×19+032×19
81015-1075×04-57
958×(387-013)
(-801)+42×374
103252-(6+9728÷32)×25
11[(71-56)×09-115] ÷25
1254÷[26×(37-29)+062]
1312×6÷(12-72)-6
1412×6÷72-6
153302-(1484-9085)÷25
(-5)-252×(-78)
(-6) ×(-2)+3÷(5+50)
7-7+3-6-(-90)
(-8)(-3)×(-8)×25
(7+13) ÷(-616)÷(-28)
(8+14-100-27)÷4
(-15) ÷(-1)-101÷10
16÷021×(-8) ×(41+59)
(-10) ×(-2) ×4÷{-9÷[6+(-567)]}
(-18)(-4)2×[801×(-314)
9-32{-890-[79+81] ×9}
(-20)-23+(-9) ×942
(-24)34×104÷(-5) ×20096
[-|98|+76+(-87)]23[56+(-75)-(7)]-(8+4+3)
5+218/2-6-59
68/21-8-118+61
-2/9-7/9-56
46-(-3/4+16-4-3/4)
1/2+3+5/6-7/12
[2/3-4-1/4(-04)]/1/3+2
22+(-4)+(-2)+43
-28-81/2+8/1/8
(2/3+1/2)/(-1/12)(-12)
(-28)/(-6+4)+(-1) +√9
2/(-2)+0/7-(-8)(-2)
(1/4-5/6+1/3+2/3)/1/2
18-6/(-3)(-2) ×2^7
(5+3/88/30/(-2)- √36
(-84)/2(-3)/(-6)
1/2(-4/15)/2/3
1+2+3+4++100000
1/1+1/2+1/3+1/50
1+1/2+1/4+1/8+1/16+1/512
3+9+27+81+243+9999
1+1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90
-9
③:计算:(-15)/(-1/2 + 1/3)6
解:=(-15)/(-1/6)6 (第一步)
=(-15)/(-1) (第二步)
=-15 (第三步)
有两个错,第一处是第(一)步,错误原因是(-1/2 + 1/3=-1/12)第二处是第(二)步,错误原因是(乘除要先左后右)
请正确计算出结果。
④:对有理数a、b定义运算◎如下:a◎b=ab/(a+b)。
试比较:(-3)◎4____3◎(-4)
⑤:计算:(-1 又1/2)(-1又1/3)(-1又1/4)(-1又1/5)(-1又1/6)(-1又1/7)
=(-3/2)(-4/3)(-5/4)(-6/5)(-7/6)(-8/7)
=8/9
⑥:若a、b为有理数,根据下列条件回答问题:
(1)若a、b>0,a+b>0,确定a,b的符号 a,b(-)
(2)若ab<0,a+b>0,确定a,b的符号 a(+ -),b(+ -)
(3)若ab<0,a+b>0,且|a|>|b|,确定a,b的符号 a(+),b(-)
⑦:已只x、y为有理数,如果定义一种新运算※,规定x※y=xy+1,如2※(-1)=2(-1)+1=-1请利用该定义计算:(-1)※(-4)※(-2)
=[-1(-4)+1]※(-2)
=5※(-2)
=5(-2)+1
=-9
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