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)

2/ 1*2= 1 3/ 1*3= 1 3/2*3=2 3/ 1*6=2

4/3*8=6 5/3*20= 12 7/3* 14=6 8/7*40=35

4/3* 16= 12 9/5*27= 15 2/ 1*30= 15 12/7*24= 14

30/ 1*30= 1 5 1/9* 102= 18 19/9*76=36 4/9*8= 18

5/8*90= 144 99/98*99=98 3/ 14*6=28 7/ 1*28=4

10/ 1*90=9 5/3* 105=63 19/7*38= 14 5/ 1*25=5

8/ 19* 16=38 6 1/60* 122= 120 7/2*28=8 6/ 1*48=8

9/7* 18= 14 25/7* 100=28 9/5*8 1=45 8/9* 16= 18

No decimals

123+25= 148 123-35=88 56×7=392 135÷5=27

248+89=337 ... 146-23= 123 ... 155×5=775 ...456- 12=38 ...

456+45=50 1 ...546-457=89 ...45× 10=45 1 ...564- 12=47 ...

879+54=933 ...896-546=350 ...56× 12=672....45-5=9 ...

457+456=9 13 ...

7+ 14=2 1 ... 18-9=9 ...

8+ 16=24 ...25-5=20 ...

9+ 18=27...56-45= 1 1 ...

10+20=30...45-23=22 ...

1 1+22=33...78-23=55 ...

12+24=36 ...

10-3=7

15-4= 1 1

20-5= 15

25-6= 19

30-7=23

35-8=27

40-9=3 1

45- 10=35

50- 1 1=39

55- 12=43

60- 13=47

65- 14=5 1

70- 15=55

75- 16=59

80- 17=63

85- 18=67

90- 19=7 1

95-20=75

100-2 1=79

105-22=83

1 10-23=87

1 15-24=9 1

120-25=95

125-26=99

130-27= 103

13+26=39 ...

14+28=42 ...

15+30=45 ...

16+32=48 ...

17+34=5 1 ...

18+36=54 ...

19+38=57 ...

20+40=60 ...

2 1+42=63 ...

22+44=66 ...

23+46=69 ...

24+48=72 ...

25+50=75 ...

26+52=78 ...

27+54=8 1 ...

28+56=84 ...

29+58=87 ...

30+60=90 ...

3 1+62=93 ...

32+64=96 ...

33+66=99 ...

5 ÷ 1 =5

10 ÷2 =5

15 ÷3 =5

20 ÷4 =5

25 ÷5 =5

30 ÷6 =5

35 ÷7 =5

40 ÷8 =5

45 ÷9 =5

50 ÷ 10 =5

55 ÷ 1 1 =5

60 ÷ 12 =5

65 ÷ 13 =5

70 ÷ 14 =5

75 ÷ 15 =5

80 ÷ 16 5

85 ÷ 17 5

90 ÷ 18 5

95 ÷ 19 5

100 ÷20 5

2/ 1*2= 1 3/ 1*3= 1 3/2*3=2 3/ 1*6=2 4/3*8=6 5/3*20= 12 7/3* 14=6 8/7*40=35 4/3* 16= 1 2 9/5* 27= 15 2/ 1*30= 15 12/7*24= 14 30/ 1*30= 1 5 1/9* 102= 18 19/9* 76=36 4/9*8= 18 5/8* 90= 144 99/98*99=98 3/ 14*6=28 7/ 1*28=4 10/ 1*90=9 5/3* 105=63 19/7* 38= 14 5/ 1*25=5 8/ 19* 16=38 6 1/60* 122= 120 7/2*28=8 6/ 1*48=8 9/7* 18= 1 4 25/7* 100=28 9/5*8 1=45 8/9* 16= 18

12÷3/5 = 12×(5/3)9÷6/7 = 9×(7/6)30÷5/6 = 30×(6/5)4×(3/2)= 4÷2/3(4)÷5/7 = 4×7/5 3÷4/5 = 3×5/4(24)÷7/ 16 = 24×( 15

2/ 1*2= 1 3/ 1*3= 1 3/2*3=2 3/ 1*6=2

4/3*8=6 5/3*20= 12 7/3* 14=6 8/7*40=35

4/3* 16= 12 9/5*27= 15 2/ 1*30= 15 12/7*24= 14

30/ 1*30= 1 5 1/9* 102= 18 19/9*76=36 4/9*8= 18

5/8*90= 144 99/98*99=98 3/ 14*6=28 7/ 1*28=4

10/ 1*90=9 5/3* 105=63 19/7*38= 14 5/ 1*25=5

8/ 19* 16=38 6 1/60* 122= 120 7/2*28=8 6/ 1*48=8

9/7* 18= 14 25/7* 100=28 9/5*8 1=45 8/9* 16= 18

2. Solve the equation

1.X-5.7=2. 15

2. 15 5X-2X= 18

3.3X+0.7=5

4.3.5×2= 4.2+x

5.26× 1.5= 2x+ 10

6.0.5× 16― 16×0.2=4x

7. 13 9.25-X=0.403

8. 16.9÷X=0。 three

9.X÷0.5=2.6

10 .x+ 13=33

1 1.3-5 times =80

12. 1.8 +6x=54

13 .6.7x -60.3=6.7

14.9 +4x =40

15.80*3.8=X*2.6

16.3X-X=24

17.3X-X=42

18.2X=42

19.X-99=88

20.30-X= 1

2 1.654+X=999

22 .88*X=88

23 .99*X=99

24.95*X=9025

25.85*X=7225

26.75*X=5625

27.45*X=2025

28.25*X=625

29. 15*X=225

30.65*X=4225

3X+5X = 48 14X-8X = 12 6 * 5+2X = 44

20X-50 = 50 28+6X = 88 32-22X = 10

24-3X = 3 10X *(5+ 1)= 60 99X = 100-X

X+3 = 18 X-6 = 12 56-2X = 20

4y+2=6 x+32=76 3x+6= 18

16+8x=40 2x-8=8 4x-3*9=29

8x-3x= 105 x-6*5=42 x+5=7

2x+3 = 10 12x-9x = 9 6x+ 18 = 48

56x-50x=30 5x= 15 78-5x=28

32y-29=3 5x+5= 15 89x-9=80

100-20x = 20 55x-25x = 60 76y-75 = 1

23y-23 = 23 4x-20 = 0 80y+20 = 100

53x-90 = 16 2x+9x = 1 1 12y- 12 = 24

80+5x = 100 7x-8 = 6 65x+35 = 100

19y+y = 40 25-5x = 15 79y+y = 80

42x+28x = 140 3x- 1 = 8 90y-90 = 90

80y-90 = 70 78y+2y = 160 88-x = 80

9-4x = 1 20x = 40 65y-30 = 100

5 1y-y = 100 85y+ 1 =-86 45x-50 = 40

3. Simple calculation.

45.55-(6.82+ 15.55)

34.52- 17.87- 12.23

6.43-( 1.4-0.57)

23.75-8.64-3.46

17.83-9.5-7.83-0.5

5.38+88.2-2.38+ 1.8

27.38-5.34+2.62-4.66

2 1.63-(8.5+9.63)

7.5-2.45+7.5+2.45

0.9+0.99+0.999

5.09-(0.09+ 1.23)

9.36-(4.36-3.5)

609-708+306- 108+202- 198+497- 100

14+ 15+ 16+……+45+46

9999+9998+9997+9996

99999×26+33333×22

19 175÷59+678

36.5× 1.4-8.5 1÷3.7

1.3-3.79+9.7-6.2 1

8×0.4× 12.5×2.5

125×(8+0.8+0.08)

35 ÷〔78 -(25 +38 )〕

1.7+ 150 +3.98

17.625-(4.4+58 )

3.35×6.47×2+6.7×3.6

18.7-3.375-6.625

2.5×4.4

25× 1.25×32

(3.75+4. 1+2.35)×9.8

1.28+9.8+7.72+ 10.2

12 × 1 120 + 12 ×2049

( 1)2002+98+997+9996+99995

(2)0. 1÷0. 1÷0. 1÷……÷0. 1

50 0 0. 1

(3)333……3^2

1998 3

(4) 125×32×25

(5)0.000……024÷0.000……048

200 1 0 2002 0

(6) 1^3+2^3+3^3+……+ 10^3

(7) 13579+3579 1+579 13+79 135+9 1357

(8) 1 1 1 1+2222+3333+4444

(9) 12! ÷5! ÷4! ÷3! ÷280

( 10) 1÷4÷8÷ 1.25÷0.25

( 1 1)200 1^2-2000^2+ 1999^2- 1998^2

(12) found the unit number1998×1998×1998× ... ×1998.

(13) Find the remainder of 888 ... 8 divided by 26.

1999 8