2.4÷20=
3.5×200=
4. 1.5-0.06=
5.0.75÷ 15=
6.0.4×0.8=
7.4×0.25=
8.0.36+ 1.54=
9. 1.0 1×99=
10.420÷35=
1 1.25× 12=
12. 135÷0.5=
13.3/4 + 1/4 =
14.2 + 4/9 =
15.3 - 2/3 =
16.3/4 - 1/2=
17. 1/6 + 1/2 - 1/6 =
18.7.5-(2.5+3.8)=
19.7/8 + 3/8 =
20.3/ 10 + 1/5 =
2 1.4/5 - 7/ 10 =
22.2 - 1/6 - 1/3 =
23.0.5 1÷ 17=
24.32.8+ 19=
25.5.2÷ 1.3=
26. 1.6×0.4=
Recursive calculation
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 1.2÷2.5+2.5÷2
52. 194-64.8÷ 1.8×0.9
53.36.72÷4.25×9.9
54.5 180-705×6
55.24÷2.4-2.5×0.8
56.(4 12 1+2389)÷7
57.67 1× 15-974
58.469× 12+ 1492
59.405×(32 13-3 189)
60.3.4 16÷(0.0 16×35)
6 1.0.8×[( 10-6.76)÷ 1.2]
62. 19.4×6. 1×2.3 5.67×0.2-0.62
63. 18. 1×0.92+3.93 0.0430.24+0.875
64.0.4×0.7×0.25 0.75× 102 100-56.23
65.0.78+5.436+ 1 4.07×0.86+9. 12.5
Simple operation
1. 1-2+3-4+5-6+7-8+9- 10+ 1 1- 12+................+2003-2004+2005-2006+2007
= 1+(3-2)+(5-4)+.........+(2007-2006)
= 1+(2007- 1)/2
= 1005
2、480+325+75
=480+(325+75)
=480+400
=880
3、295- 128-72
=295+( 128+72)
=295+200
=495
4、43×25×4
=43×(25×4)
=43× 100
=4300
5、 102×43
=( 100+2)×43
= 100×43+2×43
=4300+86
=4386
6、9×37+9×63
=9×(63+37)
=9× 100
=900
7.66×38-987÷2 1 66×38-987÷2 1
=2508-987÷2 1 =2508-47
=2508-47 =246 1
=246 1
8. 1.25* 17.6+36. 1/0.8+2.36* 12.5
1.25* 17.6+36. 1/0.8+2.36* 12.5
=(5/4)* 17.6+36. 1*(5/4)+23.6*(50/4)
= 176/8+36 1/8+236/8
=773/8=96.625
9.7.5*2.3+ 1.9*2.5
7.5*2.3+ 1.9*2.5
=7.5*( 1.9+0.4)+ 1.9*2.5
=(7.5+2.5)* 1.9+7.5*0.4
= 19+3 =22
10.2004/2003*2005
2004/2003*2005
=(2004/2003)*(2003+2)
=2004+4008/2003
1 1.276*543-267/276+543*275
276*543-267/276+543*275
=543*(276+275)-267/276
=543*55 1-267/276
12.2002+200 1-2000- 1999+ 1998+ 1997- 1996- 1995+……+2+ 1
=(2002-2000)+(200 1- 1999)+( 1998- 1996)+( 1997- 1995)+……+(6-4)+(5-3)+2+ 1
= 2+2+2+2+...+2+2 (from 3-2002 * * 2000, with 1000 binary) +2+ 1.
= 1000×2+2+ 1
=2003
13. 1/3+ 1/05++ 1/35+ 1/63+9 1/9
= 1/( 1×3)+ 1/(3×5)+ 1/(5×7)+ 1/(7×9)+ 1/(9× 1 1)
= 1/2×( 1- 1/3)+ 1/2×( 1/3- 1/5)+ 1/2×( 1/5- 1/7)+ 1/2×( 1/7- 1/9) + 1/2×( 1/9- 1/ 1 1)
= 1/2×( 1 - 1/3 + 1/3 - 1/5 + 1/5 - 1/7 + 1/7 - 1/9 + 1/9 - 1/ 1 1)
= 1/2×( 1- 1/ 1 1)
= 1/2× 10/ 1 1
=5/ 1 1
14.0.49÷ 1.4 1.25×2.5×32 3.6-0.6×2
15.3.65× 10. 1 3.6-3.6×0.8 15.2÷0.25÷4
16.5.6÷3.5 9.6÷0.8÷0.4 4.2×99+4.2
17.0.89× 100. 1 146.5-(23+46.5) 17.8÷( 1.78×4)
18.5.83×2+4.27 (45.9-32.7)÷8÷0. 125 9.7×99+9.7
19.4.36× 12.5×8 15.6× 13. 1- 15.6- 15.6×2. 1 0.65× 10 1
20.27.5×3.7-7.5×3.7 8.54÷2.5÷0.4 3.83×4.56+3.83×5.44
2 1.9.9×0.625× 10 1-62.5
22.9.9×8.6+0.86
23.0.46×7.5+0.46×2.5
24.4.6×8.04+6.4×8.04-8.04
25.5.4×0. 15÷0.2+4.6×0. 15
=27*0. 15+4.6*0. 15
=(27+4.6)*0. 15
=3 1.6*0. 15
=4.74
26.55× 10.43+ 104.3×4.4+ 104.3×0. 1
=55× 10.43+ 10.43×44+ 10.43× 1
=(55+44+ 1)* 10.43
= 100* 10.43
= 1043
17×40=680, 100-63=37, 3.2+ 1.68=4.88, 2.8×0.4= 1. 12
14-7.4=6.6, 1.92÷0.04=48, 0.32×500= 160, 0.65+4.35= 5
10-5.4=4.6, 4÷20=0.2, 3.5×200=700, 1.5-0.06= 1.44
0.75÷ 15=0.05, 0.4×0.8=0.32, 4×0.25= 1, 0.36+ 1.54=2
1.0 1×99=99.99, 420÷35= 12, 25× 12=300, 135÷0.5=270
3/4 + 1/4 = 1, 2 + 4/9 =22/9, 3 - 2/3 =7/3, 3/4 - 1/2= 1/4
1/6 + 1/2 - 1/6 = 1/2, 7.5-(2.5+3.8)= 1.2, 7/8 + 3/8 =5/4
3/ 10 + 1/5 = 1/2, 4/5 - 7/ 10 = 1/ 10, 2 - 1/6 - 1/3 = 1.5
0.5 1÷ 17=0.03, 32.8+ 19=5 1.8, 5.2÷ 1.3=4, 1.6×0.4= 0.64
4.9×0.7=3.43, 1÷5=0.2, 6÷ 12=0.5, 0.87-0.49=0.38
1.( 1+ 1/2)( 1+ 1/3)( 1+ 1/4)......( 1+ 1/ 100)
2.( 1- 1/2)( 1- 1/3)( 1- 1/4)......( 1- 1/ 100)
3.8+2-8+2
4.25*4/25*4
5.7.26-(5.26- 1.5)
6.286+ 198
7.3 14-202
8.526+30 1
9.223-99
10.6.25+3.85-2. 125+3.875
1 1.9-2456*2 1
12.0.5/ 1 1.5-4*2.75
13. 1/2×3/5
14.3.375+5.75+2.25+6.625
15. 100 1-9036÷ 18
16.3.8×5.25+ 14.5
17.2. 1*4.3+5.7*2. 1
18.30× 1/3
19. 102*45-328
20.2/3× 12
2 1.2.8*3. 1+ 17.6/8
22.3/5×5/6
23.(50- 12.5)/2.5
24.2/5× 1/3
25.6 1 10*47+639
26. 1/2- 1/6
27.3.5*2.7-52.2/ 18
28. 1/7× 1/5
29.3.375*0.97+0.97*6.625
30.25×4/5
3 1.6.54+2.4+3.46+0.6
32.5/6- 1/2
33.95.6* 1.8+95.6*8.2
34. 1/2× 1/5
35.600-420/ 12
36.344/3.6-5.4*0.25
37. 16/2+30/2+90/6
38.300 1- 1998.
39.5000- 105*34
40.0. 15/0.25+0.75* 1.2
4 1.( 1/2+ 1/3+ 1/4)*0.24
42.(25+4)*4
43.300-4263/2 1
44.0.8 1/0.25+5.96
45.403÷ 13×27
46. 1.5×4.2-0.75÷0.25
47.3.27×4 +3.27×5.7
48.( 1.2+ 1.8)×4.5 1025-768÷32
49.0.25×80-0.45÷0.9
50. 1025-768÷32
5 1.0.25*2.69*4
52.2348+275* 16
53.2/9* 15/8- 1/ 12*9/5
54.2.4+2.4*(5.375-3.375)
55.645-45* 12
56.0. 15+ 1.2/0.24-0.45
57.3.75-(2.35+0.25/ 1.25)
58.76* 1/4+23*25/ 100+0.25
59. 10-2.87-7. 13
60.0.96+9.6*9.9
6 1.7.5-5.7* 1/3
62. 12.37-3.25-6.75
63. 16*6.8+2.2* 16+ 16
64.40 1* 19+284
65.58.7- 16.65/3.7
66.0.4*4.7*2.5+(2.3+5.3)
67.9.3 1- 1. 125-7.875
68.640+ 128*45
69.8.2* 1.6-0.336/4.2
70.400*(0.62+0.08)
1.5×3.6=( ) 3.7×5.3=( ) 2.3×6=( )
8. 1×3.4=( ) 7.6×4.3=( ) 1.6×5.3=( )
4.3×7-6.3+5. 1=( ) 6.2÷3. 1×4.5=( )
(8.6- 1.5+9.4)×9.3=( )(5.3+2.7)÷(3.6+2.5)=( )
4.5*6=?
6-4.05=?
8.4÷0.7=?
3.67+6. 13=?
0.5* 1.2=?
0.55÷ 1. 1=?
5.42+7.5* 1.6=?
0.25* 1.7*0.4=?
7.86-40 15-2.85=?
0. 125*32*2.5=?
4.5*6=?
6-4.05=?
8.4÷0.7=?
3.67+6. 13=?
0.5* 1.2=?
0.55÷ 1. 1=?
5.42+7.5* 1.6=?
0.25* 1.7*0.4=?
7.86-40 15-2.85=?
0. 125*32*2.5=?
4.5*6=?
6-4.05=?
8.4÷0.7=?
3.67+6. 13=?
0.5* 1.2=?
0.55÷ 1. 1=?
5.42+7.5* 1.6=?
0.25* 1.7*0.4=?
7.86-40 15-2.85=?
0. 125*32*2.5=?
1、 1.2×3=
5、2-0.8=
9、 10.7-5.7=
13、0.52+0.08=
17、2÷5=
2 1、8×0.03
25、0.0 1× 100=
25、30×0.0 1=
29、0× 1.22=
40、0.6×5=
43、 1.2-0.9=
6、0.54÷0.6=
10、0.26×0.3=
14、 1÷0.05=
18、20×0.4=
26、2.8+ 10.2=
34、7-0.9=
58、0.55+0.3=
38、0.8+0.2=
4 1、 16÷0.4=
44、0. 14×5=
19、2.5×4=
3 1、 15.3- 10=
35、3.3+7=
39、6÷ 10=
45、0.86+2. 14=
8、0.37+4=
16、3.2÷0.8=
20、0.45+0.55=
24、6.4÷8=
1.( 1+ 1/2)( 1+ 1/3)( 1+ 1/4)......( 1+ 1/ 100)
2.( 1- 1/2)( 1- 1/3)( 1- 1/4)......( 1- 1/ 100)
3.8+2-8+2
4.25*4/25*4
5.7.26-(5.26- 1.5)
6.286+ 198
7.3 14-202
8.526+30 1
9.223-99
10.6.25+3.85-2. 125+3.875
1 1.9-2456*2 1
12.0.5/ 1 1.5-4*2.75
13. 1/2×3/5
14.3.375+5.75+2.25+6.625
15. 100 1-9036÷ 18
16.3.8×5.25+ 14.5
17.2. 1*4.3+5.7*2. 1
18.30× 1/3
19. 102*45-328
20.2/3× 12
2 1.2.8*3. 1+ 17.6/8
22.3/5×5/6
23.(50- 12.5)/2.5
24.2/5× 1/3
25.6 1 10*47+639
26. 1/2- 1/6
27.3.5*2.7-52.2/ 18
28. 1/7× 1/5
29.3.375*0.97+0.97*6.625
30.25×4/5
3 1.6.54+2.4+3.46+0.6
32.5/6- 1/2
33.95.6* 1.8+95.6*8.2
34. 1/2× 1/5
35.600-420/ 12
36.344/3.6-5.4*0.25
37. 16/2+30/2+90/6
38.300 1- 1998.
39.5000- 105*34
40.0. 15/0.25+0.75* 1.2
4 1.( 1/2+ 1/3+ 1/4)*0.24
42.(25+4)*4
43.300-4263/2 1
44.0.8 1/0.25+5.96
45.403÷ 13×27
46. 1.5×4.2-0.75÷0.25
47.3.27×4 +3.27×5.7
48.( 1.2+ 1.8)×4.5 1025-768÷32
49.0.25×80-0.45÷0.9
50. 1025-768÷32
5 1.0.25*2.69*4
52.2348+275* 16
53.2/9* 15/8- 1/ 12*9/5
54.2.4+2.4*(5.375-3.375)
55.645-45* 12
56.0. 15+ 1.2/0.24-0.45
57.3.75-(2.35+0.25/ 1.25)
58.76* 1/4+23*25/ 100+0.25
59. 10-2.87-7. 13
60.0.96+9.6*9.9
6 1.7.5-5.7* 1/3
62. 12.37-3.25-6.75
63. 16*6.8+2.2* 16+ 16
64.40 1* 19+284
65.58.7- 16.65/3.7
66.0.4*4.7*2.5+(2.3+5.3)
67.9.3 1- 1. 125-7.875
68.640+ 128*45
69.8.2* 1.6-0.336/4.2
70.400*(0.62+0.08)
1/2+ 1/3
2/ 1-5/4
9\3*3\9
3/4+5/4=? 4/5+6/5=? 5/6+6/7=?
4.02+5.4+0.98 5. 17- 1.8-3.2 13.75-(3.75+6.48)
3.68+7.56-2.68 7.85+2.34-0.85+4.66 35.6- 1.8- 15.6-7.2
3.82+2.9+0. 18+9. 1 9.6+4.8-3.6 7. 14-0.53-2.47
5.27+2.86-0.66+ 1.63 13.35-4.68+2.65 47.8-7.45+8.8
0.398+0.36+3.64 15.75+3.59-0.59+ 14.25 42.5-(6.07+ 1. 13)
73.8- 1.64- 13.8-5.36 66.86-8.66- 1.34 0.25× 16.2×4
3.72×3.5+6.28×3.5 36.8-3.9-6. 1 2 5.48-(9.4-0.52)
4.8×7.8+78×0.52 3.6× 102 6.4×0.25+3.6÷4
32+4.9-0.9 4.8-4.8×0.5 ( 1.25-0. 125)×8
4.8× 100. 1 56.5×9.9+56.5 7.09× 10.8-0.8×7.09
4.2÷3.5 320÷ 1.25÷8 18.76×9.9+ 18.76
3.52÷2.5÷0.4 4.78÷0.2+3.44 3.9-4. 1+6. 1-5.9
0.49÷ 1.4 1.25×2.5×32 3.6-0.6×2
3.65× 10. 1 3.6-3.6×0.8 15.2÷0.25÷4
5.6÷3.5 9.6÷0.8÷0.4 4.2×99+4.2
0.89× 100. 1 146.5-(23+46.5) 17.8÷( 1.78×4)
5.83×2+4.27 (45.9-32.7)÷8÷0. 125 9.7×99+9.7
4.36× 12.5×8 15.6× 13. 1- 15.6- 15.6×2. 1 0.65× 10 1
27.5×3.7-7.5×3.7 8.54÷2.5÷0.4 3.83×4.56+3.83×
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
( 1)58+42= (2)87-45= (3) 125×8=
(4)50× 12= (5)804÷4= (6) 134+66=
(7) 1000-98= (8)720÷5= (9)0÷47=
( 1) 168+36-36+32=
(2) 153-5× 14+83=
(3)50×5÷50×5=
(5)24×25=6×4×25=6+ 100= 106( )
( 1)3786-499
(2)32×25× 125
(3) 1653-338-662
(4)7987+350+20 13+450
(5)38×38+62×38
(6)452+99×452
(7)20 1×79
(8)50× 125×4×8
( 1)340×( 120-40÷8)
(2)45×(720- 1957÷ 19)
(3)86+[4500+(2088÷36)÷2]
(4)396×[74-(4875÷ 15- 13×2 1)]
(5)[ 1054-( 174- 168)]÷8
(6)6048÷[( 107-99)×9]
3.84*7.6-3.84*6.6
1-(8.64/8.64- 182.4/9 1.2*0.5)
3.8/ 1.25/ 1.25/8/8
9.56*99+9.56
102*20.03- 1.25*20.03*0.8
9.99*4.87