2)4/9X(-9/ 14)-(-5/9)X(-9/ 14)-9/ 14X(- 1 1/9)=？
3) 1/5x 9+ 1/9x 13+ 1/ 13x 17+... 1/ 10 1x 105 =？
4)[(- 1/2) square +(- 1/4)X 16+4 square] x [(-3/2)-3]+441/8+/kloc-0.
5) Square (-1)+(- 1)+ Cube (-1)...+(- 1) 99th power +(- 1) 100.
Answer1) 8/3+(-5/2)+(+16/3)+(-1/2)+(3/4-2/3-1/.
=(8/3+ 16/3)-(5/2+ 1 1/2)+(3*3-2*4-2)
=8-8+9-8-2
=- 1
2)4/9X(-9/ 14)-(-5/9)X(-9/ 14)-9/ 14X(- 1 1/9)
=-4/ 14-5/ 14+ 1 1/ 14
=2/ 14
= 1/7
3) 1/5x 9+ 1/9x 13+ 1/ 13x 17+... 1/ 10 1x 105
= 1/4( 1/5- 1/9)+ 1/4( 1/9- 1/ 13)+ 1/4( 1/ 13- 1/ 17)+… 1/ 4( 1/ 10 1- 1/ 105)
= 1/4( 1/5- 1/9+ 1/9- 1/ 13...+ 1/ 10 1- 1/ 105)
= 1/4( 1/5- 1/ 105)
= 1/2 1
4)[(- 1/2) square +(- 1/4)X 16+4 square] x [(-3/2)-3]+441/8+/kloc-0.
=( 1/4-4+ 16)(-9/2)+44 1/8+ 1399/ 14+ 1399/ 14X(-7)+ 1399/ 14 * 7
=49/4*(-9/2)+44 1/8+ 1399/ 14+0
=-44 1/8+44 1/8+ 1399/ 14
= 1399/ 14
5) Square (-1)+(- 1)+ Cube (-1)...+(- 1) 99th power +(- 1) 100.
(Because the square of (-1)+(- 1) ...+(-1) 99th power+(-1)100th power =0))
So:
Original formula =1/4+1/28+...+1/9700.
= 1/ 1*4+ 1/4*7+……+ 1/97* 100
= 1/3( 1- 1/4+ 1/4- 1/7+...+ 1/97- 1/ 100)
= 1/3( 1- 1/ 100)
=33/ 100=0.33
(-1)+(- 1) square +(- 1) cube +...+(- 1) 99th power +(- 1) 100 power+60.
(Because the square of (-1)+(- 1) ...+(-1) 99th power+(-1)100th power =0))
So:
Original formula =1/4+1/28+...+1/9700.
= 1/ 1*4+ 1/4*7+……+ 1/97* 100
= 1/3( 1- 1/4+ 1/4- 1/7+...+ 1/97- 1/ 100)
= 1/3( 1- 1/ 100)
=33/ 100=0.33
(-1)+(- 1) square +(- 1) cube +...+(- 1) 99th power +(- 1) 100 power+60.
(Because the square of (-1)+(- 1) ...+(-1) 99th power+(-1)100th power =0))
So:
Original formula =1/4+1/28+...+1/9700.
= 1/ 1*4+ 1/4*7+……+ 1/97* 100
= 1/3( 1- 1/4+ 1/4- 1/7+...+ 1/97- 1/ 100)
= 1/3( 1- 1/ 100)
=33/ 100=0.33
1. 125*3+ 125*5+25*3+25
2.9999*3+ 10 1* 1 1*( 10 1-92)
3.(23/4-3/4)*(3*6+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 )
1 1.7/8 + ( 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 × 1 1/5
17.3 1 × 5/6 – 5/6
18.9/7 - ( 2/7 – 10/2 1 )
19.5/9 × 18 – 14 × 2/7
20.4/5 × 25/ 16 + 2/3 × 3/4
2 1. 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/ 1 1 ÷ 1/2
28.5/3 × 1 1/5 + 4/3
29.45 × 2/3 + 1/3 × 15
30.7/ 19 + 12/ 19 × 5/6
3 1. 1/4 + 3/4 ÷ 2/3
32.8/7 × 2 1/ 16 + 1/2
33. 10 1 × 1/5 – 1/5 × 2 1
34.50+ 160÷40
35. 120- 144÷ 18+35
36.347+45×2-4 160÷52
37(58+37)÷(64-9×5)
38.95÷(64-45)
39. 178- 145÷5×6+42
40.8 12-700÷(9+3 1× 1 1)
4 1.85+ 14×( 14+208÷26)
43. 120-36×4÷ 18+35
44.(58+37)÷(64-9×5)
45.(6.8-6.8×0.55)÷8.5
46.0. 12× 4.8÷0. 12×4.8
47.(3.2× 1.5+2.5)÷ 1.6
48.6- 1.6÷4= 5.38+7.85-5.37=
49.7.2÷0.8- 1.2×5= 6- 1. 19×3-0.43=
50.6.5×(4.8- 1.2×4)=
5 1.5.8×(3.87-0. 13)+4.2×3.74
52.32.52-(6+9.728÷3.2)×2.5
53.[(7. 1-5.6)×0.9- 1. 15] ÷2.5
54.5.4÷[2.6×(3.7-2.9)+0.62]
55. 12×6÷( 12-7.2)-6
56. 12×6÷7.2-6
57.0.68× 1.9+0.32× 1.9
58.58+370)÷(64-45)
59.420+580-64×2 1÷28
60. 136+6×(65-345÷23)
15- 10.75×0.4-5.7
62. 18. 1+(3-0.299÷0.23)× 1
63.(6.8-6.8×0.55)÷8.5
64.0. 12× 4.8÷0. 12×4.8
65.(3.2× 1.5+2.5)÷ 1.6
66.3.2×6+( 1.5+2.5)÷ 1.6
67.0.68× 1.9+0.32× 1.9
68. 10. 15- 10.75×0.4-5.7
69.5.8×(3.87-0. 13)+4.2×3.74
70.32.52-(6+9.728÷3.2)×2.5
7 1.[(7. 1-5.6)×0.9- 1. 15] ÷2.5
72.5.4÷[2.6×(3.7-2.9)+0.62]
73. 12×6÷( 12-7.2)-6
74. 12×6÷7.2-6
75.33.02-( 148.4-90.85)÷2.5
1) 76.(25%-695%- 12%)*36
77./4*3/5+3/4*2/5
78. 1- 1/4+8/9/7/9
79.+ 1/6/3/24+2/2 1
80./ 15*3/5
8 1.3/4/9/ 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.+5268.32-2569
86.3+456-52*8
87.5%+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 )
1 1) 8 × 5/6 + 5/6
12) 1/4 × 8/9 - 1/3
13) 10 × 5/49 + 3/ 14
14) 1.5 ×( 1/2 + 2/3 )
15) 2/9 × 4/5 + 8 × 1 1/5
16) 3. 1 × 5/6 – 5/6
17) 4/7 - ( 2/7 – 10/2 1 )
18) 19 × 18 – 14 × 2/7
19) 5 × 25/ 16 + 2/3 × 3/4
20) 4 × 8/7 – 5/6 × 12/ 15
2 1) 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
1 1、 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/ 1 1
23) 1.2×2.5+0.8×2.5
24) 8.9× 1.25-0.9× 1.25
25) 12.5×7.4×0.8
26) 9.9×6.4-(2.5+0.24)(27) 6.5×9.5+6.5×0.5
0.35× 1.6+0.35×3.4
0.25×8.6×4
6.72-3.28- 1.72
0.45+6.37+4.55
5.4+6.9×3-(25-2.5)2×4 1846-620-380
4.8×46+4.8×54
0.8+0.8×2.5
1.25×3.6×8×2.5- 12.5×2.4
28× 12.5- 12.5×20
23.65-(3.07+3.65)
(4+0.4×0.25)8×7× 1.25
1.65×99+ 1.65
27.85-(7.85+3.4)
48× 1.25+50× 1.25×0.2×8
7.8×9.9+0.78
( 10 10+309+4+68 1+6)× 12
3×9 146×782×6×854
5. 15×7/8+6. 1-0.60625
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
1 1.7 × 5/49 + 3/ 14
12.6 ×( 1/2 + 2/3 )
13.8 × 4/5 + 8 × 1 1/5
14.3 1 × 5/6 – 5/6
15.9/7 - ( 2/7 – 10/2 1 )
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
2 1.5/7 × 3/25 + 3/7
22.3/ 14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24.9/22 + 1/ 1 1 ÷ 1/2
25.5/3 × 1 1/5 + 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 × 2 1/ 16 + 1/2
30. 10 1 × 1/5 – 1/5 × 2 1
3 1.50+ 160÷40 (58+370)÷(64-45)
32. 120- 144÷ 18+35
33.347+45×2-4 160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36. 178- 145÷5×6+42 420+580-64×2 1÷28
37.8 12-700÷(9+3 1× 1 1) ( 136+64)×(65-345÷23)
38.85+ 14×( 14+208÷26)
39.(284+ 16)×(5 12-8208÷ 18)
40. 120-36×4÷ 18+35
4 1.(58+37)÷(64-9×5)
42.(6.8-6.8×0.55)÷8.5
43.0. 12× 4.8÷0. 12×4.8
44.(3.2× 1.5+2.5)÷ 1.6 (2)3.2×( 1.5+2.5)÷ 1.6
45.6- 1.6÷4= 5.38+7.85-5.37=
46.7.2÷0.8- 1.2×5= 6- 1. 19×3-0.43=
47.6.5×(4.8- 1.2×4)= 0.68× 1.9+0.32× 1.9
48. 10. 15- 10.75×0.4-5.7
49.5.8×(3.87-0. 13)+4.2×3.74
50.32.52-(6+9.728÷3.2)×2.5
5 1.[(7. 1-5.6)×0.9- 1. 15] ÷2.5
52.5.4÷[2.6×(3.7-2.9)+0.62]
53. 12×6÷( 12-7.2)-6 (4) 12×6÷7.2-6
102×4.5
7.8×6.9+2.2×6.9
5.6×0.25
8×(20- 1.25)
1) 127+352+73+44 (2)89+276+ 135+33
( 1)25+7 1+75+29 +88 (2)243+89+ 1 1 1+57
9405-2940÷28×2 1
920- 1680÷40÷7
690+47×52-398
148+3328÷64-75
360×24÷32+730
2 100-94+48×54
5 1+(2304-2042)×23
42 15+(436 1-7 16)÷8 1
(247+ 18)×27÷25
36-720÷(360÷ 18)
1080÷(63-54)×80
(528+9 12)×5-6 178
8528÷4 1×38-904
264+3 18-8280÷69
( 174+209)×26- 9000
8 14-(278+322)÷ 15
1406+735×9÷45
3 168-7828÷38+504
796-5040÷(630÷7)
285+(3000-372)÷36
1+5/6- 19/ 12
3x(-9)+7x(-9
(-54)x 1/6x(- 1/3)
1. 18. 1+(3-0.299÷0.23)× 1
2.(6.8-6.8×0.55)÷8.5
3.0. 12× 4.8÷0. 12×4.8
4.(3.2× 1.5+2.5)÷ 1.6 (2)3.2×( 1.5+2.5)÷ 1.6
5.6- 1.6÷4= 5.38+7.85-5.37=
6.7.2÷0.8- 1.2×5= 6- 1. 19×3-0.43=
7.6.5×(4.8- 1.2×4)= 0.68× 1.9+0.32× 1.9
8. 10. 15- 10.75×0.4-5.7
9.5.8×(3.87-0. 13)+4.2×3.74
10.32.52-(6+9.728÷3.2)×2.5
1 1.[(7. 1-5.6)×0.9- 1. 15] ÷2.5
12.5.4÷[2.6×(3.7-2.9)+0.62]
13. 12×6÷( 12-7.2)-6
14. 12×6÷7.2-6
15.33.02-( 148.4-90.85)÷2.5
7×(5/2 1+9/7 14)
1.8 1÷9÷9=
2.54÷6÷3=
3.38-9=
4.4 1÷5=
5.52-7=
6.77-70=
7.54+20=
8.9×3=
9.700+ 1000=
10.5080-80=
430+300
580-90
220+80
8×5-20
50-26
1000-700
63+42
35+5×6
720-650
670+300
260+ 150
63÷(86-79)
540+400
1000-560
360-5×8
45- 15÷5
100-(25+75)
839- 152+67
9×8
27+ 123-250
1000-425- 137
6 15-353- 187
8 1÷9
20÷8
45÷6
35÷7
60÷7
1 1. 1500-800=
12.4800-900=
13.6 10-30=
14.83-27=
15.80+720=
16. 1400- 1200=
17.578+76=
18.567+432=
19.90- 15=
20.45+36=
2 1.75+23=
22.35+ 17=
23.280-30=
24.8×6-9=
25.40+600=
26.4+7×9=
27.530+70=
28.(24- 16)×8=
29.(9-3)÷3=
30.4500-600=
3 1. 17+69=
32.45-7=
33.5005+ 150=
34.23 10+ 1270=
35.40+600=
36.37+26=
37.82-49=
38.5×9+7=
39.37+26=
40.8×4+28=
4 1. 100-86+34=
42.32+25+4 1=
43.26+28=
44.73+37=
45.97-88=
46.7×8+4=
36+48-25
(34-27)×5
96-6×8
29+42÷7
43+26- 17
48÷8×5
37-27÷9
(26- 19)×6
64÷(24- 16)
36+48-25
96-6×8
(34-27)×6
29+42÷7
5×( 100-99)
345-300÷9
63÷(34-25)
(83-83)÷9
43-42÷6
36÷9×8
48÷( 16÷2)
736+3287+ 1797
90 10-3875-2358
357+98-398
5×(4007-3998)
(345-396)÷7
4570-(2390+47)
280+400○280+40 3200-200○3200+200
360+90○90+360 880-90○800-90
420-300○420-30 387+595○299+399
( 19- 10)+(- 1235)
10- 10÷5×78
(36÷9-78)×4556
40-20÷4×89
6×( 18-9)÷6
4×7+ 1 ×45
(4×8+ 1)×56+(-46)÷2
825-387+659×(-568)
249+367×78+9
10 10-398
396+2 17×56
839- 152+67
1000-425- 137
327+495+ 123
6 15-353- 187
937-(37+ 16)
80 1- 187+245
72÷(300-292)
240-8×5
45÷(47-38)
1)8/3+(-5/2)+(+ 16/3)+(- 1 1/2)+(3/4-2/3- 1/6)x 12 =？
2)4/9X(-9/ 14)-(-5/9)X(-9/ 14)-9/ 14X(- 1 1/9)=？
3) 1/5x 9+ 1/9x 13+ 1/ 13x 17+... 1/ 10 1x 105 =？
4)[(- 1/2) square +(- 1/4)X 16+4 square] x [(-3/2)-3]+441/8+/kloc-0.
Answer1) 8/3+(-5/2)+(+16/3)+(-1/2)+(3/4-2/3-1/.
=(8/3+ 16/3)-(5/2+ 1 1/2)+(3*3-2*4-2)
=8-8+9-8-2
=- 1
2)4/9X(-9/ 14)-(-5/9)X(-9/ 14)-9/ 14X(- 1 1/9)
=-4/ 14-5/ 14+ 1 1/ 14
=2/ 14
= 1/7
3) 1/5x 9+ 1/9x 13+ 1/ 13x 17+... 1/ 10 1x 105
= 1/4( 1/5- 1/9)+ 1/4( 1/9- 1/ 13)+ 1/4( 1/ 13- 1/ 17)+… 1/ 4( 1/ 10 1- 1/ 105)
= 1/4( 1/5- 1/9+ 1/9- 1/ 13...+ 1/ 10 1- 1/ 105)
= 1/4( 1/5- 1/ 105)
= 1/2 1
4)[(- 1/2) square +(- 1/4)X 16+4 square] x [(-3/2)-3]+441/8+/kloc-0.
=( 1/4-4+ 16)(-9/2)+44 1/8+ 1399/ 14+ 1399/ 14X(-7)+ 1399/ 14 * 7
=49/4*(-9/2)+44 1/8+ 1399/ 14+0
=-44 1/8+44 1/8+ 1399/ 14
= 1399/ 14
1. 125*3+ 125*5+25*3+25
2.9999*3+ 10 1* 1 1*( 10 1-92)
3.(23/4-3/4)*(3*6+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 )
1 1.7/8 + ( 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 × 1 1/5
17.3 1 × 5/6 – 5/6
18.9/7 - ( 2/7 – 10/2 1 )
19.5/9 × 18 – 14 × 2/7
20.4/5 × 25/ 16 + 2/3 × 3/4
2 1. 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