Mathematics by Age Restriction

Age Restriction

This page contains a set of links to mathematical exercises. They are ordered by age restriction. For each age, there are corresponding exercises grouped into separate categories. Expand the lists and see the proposed options for mathematical examples.

Recommended for children from five years old

Integer Examples

Beginner 1.1 ip

3+7=10

Beginner 2.1 ip

7-4=3

Beginner 3.1 ip

4+4=8

Step-by-step Tasks

2+1=3

1+3=4

1+6=7

0+1=1

1+4=5

5-2=3

4-1=3

6-1=5

4-1=3

5-2=3

7-3=4

Recommended for children from six years

Integer Examples

14+6=20

16-10=6

9+0=9

8-6+8=10

Step-by-step Tasks

8+2=10

6+3=9

2+0=2

7+4=11

0-0=0

4+5=9

1+4=5

7+6=13

6+6=12

5+7=12

3+7=10

2+7=9

9+8=17

9+6=15

5-4=1

6+10=16

5+10=15

4-4=0

7-5=2

9-2=7

11-1=10

15-4=11

14-6=8

12-7=5

13-3=10

9-8=1

8-8=0

12-9=3

20-5=15

19-10=9

Recommended for children from seven years

Integer Examples

5-(10-7)=2

30+57=87

66-11=55

58-35=23

20-3-14=3

6+(2+2)=10

Step-by-step Tasks

9+2=11

15+10=25

9+0=9

22+2=24

23+11=34

14+4=18

5+10=15

19+19=38

15+11=26

6+11=17

7+9=16

8-6=2

21-1=20

14-2=12

19-13=6

17-4=13

8-5=3

12-6=6

27-7=20

8-8=0

1×6=6

1×2=2

1×1=1

9÷1=9

Comparisons

Natural 1.1 ip

4 > 3

Natural 2.1 ip

2-0 = 1+1

Language Exercises

Russian Vocabulary 1.1

ла ть

Recommended for children from eight years

Integer Examples

4+5=9

3+144=147

910-101=809

990-50=940

96-6-20=70

20-(7+10)=3

0×3=0

90÷2=45

9×3=27

50+40=90

91-45=46

20+60=80

Step-by-step Tasks

24+6=30

27-22=5

8+2=10

21+19=40

50+30=80

16+24=40

1+2+4=7

17-8=9

21-17=4

20-9=11

14-6=8

29-9=20

70-40=30

10×3=30

8×2=16

4×5=20

10×1=10

5×10=50

10×5=50

2×10=20

10×6=60

9×6=54

8×7=56

5×8=40

6×10=60

1×8=8

8×10=80

9×4=36

6×6=36

10×5=50

10×8=80

16÷2=8

12÷2=6

21÷3=7

2÷1=2

12÷4=3

4÷4=1

25÷5=5

0÷4=0

20÷4=5

12÷6=2

40÷5=8

35÷7=5

54÷6=9

5÷1=5

0÷8=0

0÷8=0

54÷9=6

35÷5=7

40÷2=20

100÷10=10

Comparisons

2÷2 < 4×1

68 > 7

1+0 < 44+30

10÷10 < 7×1

Equations

Linear 1.1 ip

x+4=8

Linear 2.1 ip

4÷x=2

Language Exercises

Russian Vocabulary 1.2

н уклюжий

Russian Vocabulary 2.1

чу ть

Russian Vocabulary 3.1

чер з

English Vocabulary 1.1

d ty

English Vocabulary 2.1

a ay

Lexicon 1.1

o e [single]

Lexicon 2.1

ld [aged]

Recommended for children from nine years

Integer Examples

10+7+44=61

658-169+392=881

96-(13+40)=43

16÷4×7=28

8×25=200

188÷2=94

3×150=450

3×20÷2=30

100÷(4×5)=5

5×2×(6÷3)=20

26÷3=8(2)

4813+2951=7764

3799-2000=1799

5643-4996=647

30×3=90

74÷2=37

68÷34+68=70

42-40÷20+36=76

88÷2=44

48÷5=9(3)

Step-by-step Tasks

2×17=34

8×11=88

3×17=51

10×2=20

17×4=68

15×5=75

2×12=24

5×16=80

10×4=40

6×16=96

14×7=98

6×15=90

11×8=88

39×2=78

14×9=126

19×9=171

20×8=160

20×8=160

7×8=56

24÷2=12

44÷11=4

51÷3=17

48÷3=16

56÷4=14

40÷5=8

24÷2=12

54÷3=18

100÷50=2

42÷6=7

119÷7=17

56÷7=8

88÷8=11

40÷5=8

9÷9=1

28÷7=4

90÷10=9

135÷9=15

32÷4=8

Comparisons

100-0 > 83-16

852 > 850

978-169 > 283-263

50÷5 < 4×13

Equations

Linear 1.2 ip

x-44=40

Linear 2.2 ip

40÷x=4

Linear 3.1 ip

4×x+2=10

Language Exercises

Russian Vocabulary 1.3

обн вление

Russian Vocabulary 2.2

кла с

Russian Vocabulary 3.2

Амер ка

English Vocabulary 3.1

th y

10+

Recommended for children from ten years

Integer Examples

705-161=544

3894+6106=10000

952724-492724=460000

1000000-0=1000000

649-(425+169)=55

5×(6×10)=300

9×32=288

3000÷20=150

25×32=800

40×5÷8=25

(69÷3)÷23=1

800÷2÷(5×8)=10

196÷19=10(6)

120000+793277=913277

630944-597723=33221

210000-102695=107305

8600×7=60200

5749×42=241458

304÷8=38

38-68÷4÷17=37

968-6×130=188

30×13-420÷7=330

(13-7)×(21-15)=36

995÷5=199

28÷4=7

Comparisons

Natural 0.3 ip

930 > 919

Natural 1.4 ip

324896 = 324896

Natural 2.4 ip

978592-119645 > 300438-238438

Natural 3.3 ip

1000÷20 < 813÷3

Equations

x-4=6

419+x=518

x÷149=5

78-x×3=15

(x+3)×2=10

Rounding

Round 1.1 ip

372≈37

Round 1.2 ip

9156≈92

Round 2.1 ip

917-215≈70

Language Exercises

Russian Vocabulary 2.3

акац я

English Vocabulary 1.2

la d

English Vocabulary 2.2

pau e

Lexicon 1.2

th m [pronoun]

Lexicon 2.2

our [pronoun]

Infinitive 1.1

have had [have]

11+

Recommended for children from the age of eleven

Integer Examples

Beginner 0.5 ip

783110+162887-150397=795600

Beginner 4.5 ip

61973+838027-83493=816507

Beginner 5.5 ip

517108+(102556+80200)=699864

-4+4=0

23499-299499=-276000

-3-1-5=-9

(72÷18)×14=56

23×39×3=2691

(300÷6)×180=9000

51×17×(10÷2)=4335

1000÷29=34(14)

8648×270=2334960

1200÷10=120

(39+10)×(10+9)=931

7600-10×500=2600

1633+1530÷85=1651

3528+81×32×16=45000

84+(576-76)÷4=209

(70+61)×(3822-3318)=66024

Divisor_ENG 1.3 ip

975÷13=75

Remainder_ENG 1.3 ip

251÷28=8(27)

Decimal Examples

3+(9-8.5)=3.5

33.6+13+53.4=100

8.4-3.9=4.5

79+7.9=86.9

9.7-7.8+6.1=8

39.9+29+5.1=74

9-(0.2+0.8)=8

22.1+(76.9-19.9)=79.1

35.2÷0.5=70.4

3×6.6=19.8

62.7÷2.2=28.5

1.8×5=9

Divisional_ENG 1.1 dp

23.4÷0.4=58.5

Fraction Examples

Numerator 1.1 fp

3/10+1/5=1/2

Comparisons

585389 > 324258

6×13824 > 711610÷10

5+5 > 8-10

-8 < 6

4+5 < 6+4

-4×2 < -3×2

76 = 76

20.8+2.3 < 1.1+29.9

8/9 > 2/5

583/84 > 214/57

1/2-3/10 < 3/5-1/5

Equations

4×x+47=47

x×90=630

119+930÷x=150

15×(x-44)=30

616÷(12+x)=28

-x+4=-3

-x÷3=2

Rounding

45.6≈46

48.8+1.1≈50

111+141≈25

6411≈64

856596÷247≈3

809804≈810

7376-3006≈44

999997-486≈1000

31×27≈84

3×985≈30

870504÷152≈6

Language Exercises

Russian Vocabulary 1.4

иде логия

Russian Vocabulary 3.3

пр дирчиво

English Vocabulary 1.3

perate

English Vocabulary 2.3

nless

English Vocabulary 3.2

n nth

Lexicon 1.3

brin [bear]

Infinitive 2.1

lay [lay]

12+

Recommended for children from the age of twelve

Integer Examples

1-(-1-3)=5

-4-4=-8

(13+80)+(70-100)=63

-14-5=-19

-56-21=-77

-3-7-2=-12

-10-60+39=-31

-7-(1-8)=0

-1+(11-18)=-8

-34+(90-37)=19

-(0+5)-(7-4)=-8

(14+12)+(14-20)=20

-(7+20)-(2-68)=39

(15360÷24)×265=169600

982×594=583308

270000÷750=360

780000÷240=3250

659×80×10=527200

5600÷(224÷8)=200

240×(6÷3)×950=456000

51004×1300=66305200

29750÷17=1750

90÷2-76=-31

-32-2×19=-70

-88+12×3÷2=-70

50+(-28-30)×2=-66

-6×(-3)×5=90

44÷(-2)=-22

-80÷4÷(-2)=10

(36÷6)×5=30

-32÷(-2×2)÷2=4

27246÷19=1434

Decimal Examples

38.6+(13.6+13.8)=66

42.9+50=92.9

67.12+70.42-50=87.54

8.06+(27.11-0)=35.17

-4.3+10-7.2=-1.5

-85+66.3-6.3=-25

7-4.2=2.8

16.7+5=21.7

-2.6+1.9-7.3=-8

21.5+50.7-13.9=58.3

-3.7-(6.9-8.6)=-2

-6.5-(-19.4+39.9)=-27

6÷10=0.6

2.16÷2=1.08

3.9×10=39

82×0.01=0.82

43.2÷72=0.6

55.44÷42=1.32

1÷2.5×52=20.8

5.6÷(44.8÷4)=0.5

93.7+1.5÷3÷0.5=94.7

0.8×100-11.8=68.2

10.4-0.8×5+75.7=82.1

0.8×(23.9-21.4)×10=20

Negatory 1.1 dn

68.3-70.4÷12.8=62.8

Negatory 2.1 dn

89+50.4÷56-56.2=33.7

Residual_ENG 1.1 dp

11÷5=2.2

Divisional_ENG 1.2 dp

27.36÷0.36=76

Fraction Examples

Numerator 0.1 fp

8/9-1/9-1/3=4/9

Numerator 0.2 fp

8/13+5/13+17/22=39/22

17/10+81/50=83/25

4/5-1/5-1/5=2/5

7/16+1/16+29/10=17/5

3/5-(2/5-1/5)=2/5

1/8+(63/8-58/31)=190/31

1/5+3/10+1/4=3/4

7/10-1/10=3/5

1/5+3/10+1/2=1/1

-1/2+(-3/4+1/4)=-1/1

4/3÷8/3=1/2

33/2÷99/26=13/3

14/3÷7/6×3/4=3/1

2/8=1/4

24/72=1/3

8/9÷4/3+2/3=4/3

Comparisons

-30+60 > -30+40

58 < 517

65 > -16

759 > 754

-75+84 > 5-0

-87-519 < -442-116

-12×(-3) > 68÷(-2)

832÷2 > 660÷6

0.5×8 = 27.2÷6.8

82.87 < 98.31

79.92 > 79.9

74.87 < 98.82

811.262 > 811.242

1.2+85.77 > 93.05-6.1

Point 2.3 dp

39.844-21.759 < 80.249-59.756

20.3÷2.9 < 94.5÷5

3.75×16 = 35.4÷0.59

-30.5 > -54.6

58.53-7.3 > -81.46+100

-66.5 < 30.1

-35.62 < -35.59

-1.5+100 > 62.2+3.8

26.39+57.35 > 2.22+1.44

Doted 3.1 dn

-44×1.4 < -1.4×17

Doted 3.2 dn

66.3÷(-1.95) > 19.44×(-1.75)

Improper 0.1 fp

1/3÷4/9 > 1/5÷1/3

Improper 0.2 fp

7/10×60/7 > 2/5×45/16

Improper 1.3 fp

67/383 < 75959/766

Improper 2.2 fp

405/44-157/28 < 1/2+179/28

Improper 2.3 fp

139/2-439/766 > 477/8-19/8

Improper 3.1 fp

1/2×2/3 < 5/8×4/5

Improper 3.2 fp

11/13÷33/14 < 2/3÷65/99

Descent 1.1 fn

1/6 > 1/10

Descent 1.2 fn

-5/1 < 1/2

Descent 2.1 fn

2/3-4/9 < -1/9+1/1

Equations

-2×x=-4

-x÷12-3=0

-x+45=0

53+x=-400

-x÷(-5)=-5

-x×(-2)=-700

10÷x+8=9

2×x-30=90

-10÷(1-x)=2

-44÷(-2-x)=22

Rounding

17.3÷26≈1

37.12+36.15≈73.3

17.03≈17

61.596≈61.6

66.14+6.07≈72.2

99.255-49.624≈49.63

68.8÷3≈23

25.8×1.28≈33

Language Exercises

Russian Vocabulary 2.4

к нцерт

English Vocabulary 3.3

w rking

Lexicon 2.3

p ckage [parcel]

Infinitive 1.2

rethink rethought [rethink]

Infinitive 3.1

swear [swear]

13+

Recommended for adolescents from the age of thirteen

Integer Examples

Conversant 0.4 in

-(74+223)+(670+7)=380

629575-632768=-3193

-140+532=392

563-357-206=0

548078-39883+61370=569565

Conversant 3.4 in

-511-(510-659)=-362

Conversant 3.5 in

181625-(-153365-643000)=977990

Conversant 4.4 in

(2+962)+(310-484)=790

Conversant 4.5 in

-(777050-454953)+(150000-20486)=-192583

238545÷171=1395

-295-56×44÷11=-519

10×2+312=332

63+141×10-594=879

407-48÷(-14-2)=410

320÷(16÷2)÷10=4

-88÷11=-8

4×(-2)×33=-264

2×(30×(-8))=-480

-20÷4×(-24÷(-3))=-40

4834050÷195=24790

Decimal Examples

Partitive 0.4 dp

575.157-111.661+378.05=841.546

Partitive 1.4 dp

247.113+52.56=299.673

Partitive 2.4 dp

400+298.346+158.623=856.969

Partitive 3.4 dp

348.323-(285-96.143)=159.466

Split 0.3 dn

-54.65-5.27-17.34=-77.26

Split 0.4 dn

-261.085+(-244.625+975.71)=470

Split 1.3 dn

78.85-64.55=14.3

Split 1.4 dn

344.568-375.72=-31.152

Split 2.3 dn

-34-97.91+32.82=-99.09

Split 2.4 dn

229.33+405.892-147.64=487.582

Split 3.3 dn

-40+(-3.06-48.82)=-91.88

Split 3.4 dn

-103.502+(-187.812+303.314)=12

99÷12=8.25

0.924÷0.5=1.848

3.75×4=15

4.86÷5.625=0.864

15.125×0.032=0.484

50.388÷4=12.597

79.596÷4.752=16.75

5.5×1.8×0.8=7.92

4.8×6.5×2.25=70.2

(20.99÷83.96)×0.8=0.2

Denary 5.3 dp

15.36÷(2.4÷3.125)=20

Definition 0.2 dp

14×3.61+10.8÷90=50.66

Definition 1.2 dp

2.5÷31.25+11.34=11.42

Definition 1.3 dp

1.2×0.005+84.66=84.666

Definition 2.2 dp

34.72-0.98×4×1.25=29.82

Definition 2.3 dp

19.344+5.76÷48+25.693=45.157

Definition 3.2 dp

2.1÷(63.11-52.61)×33.6=6.72

Negatory 0.1 dn

95.9-64÷2.5+20.9=91.2

Negatory 0.2 dn

41.24-(7.99+34.25)×0.75=9.56

Negatory 1.2 dn

-7×4.4+11.44=-19.36

Negatory 1.3 dn

-26.24-34.56÷6=-32

Negatory 2.2 dn

-73.46+3.36÷0.96×30=31.54

Negatory 2.3 dn

-68.375+0.8×0.01÷1.6=-68.37

Negatory 3.1 dn

0.5×(-0.5-0.3)×50=-20

Negatory 3.2 dn

(0.5+0.78)×(-4.33-6.67)=-14.08

Residual_ENG 1.2 dp

21÷10=2.1

Divisional_ENG 1.3 dp

1.32÷33=0.04

Fraction Examples

Numerator 0.3 fp

67481/693-(97/2-883/126)=4303/77

Numerator 1.3 fp

3782/351+9647/351=1033/27

Numerator 2.3 fp

5584/143-3361/143+6869/616=1495/56

Numerator 3.3 fp

113/2-(121/2-8280/197)=7492/197

Denominator 0.2 fn

8/7+79/84=25/12

Denominator 1.2 fn

-103/30+137/15=57/10

Denominator 1.3 fn

3/4+3784/71=15349/284

Denominator 2.2 fn

-305/34+9/7+19/7=-169/34

Denominator 3.2 fn

-23/35+(-338/35+38/5)=-19/7

1/5÷1/10=2/1

119/11÷1547/33=3/13

49/12×4/49=1/3

12/5×1/3×173/4=173/5

158/5×20/79÷40/37=37/5

Fragment 3.1 fp

44/5×(1/5×15/4)=33/5

Fragment 3.2 fp

(8/9×27/8)÷99/23=23/33

Reduction 1.3 fp

1050/30=35/1

Limited 0.1 fp

(3/5+7/5)÷8/3=3/4

Limited 1.2 fp

336/17×153/56-133/3=29/3

Limited 2.1 fp

13/4÷(19/4-17/4)=13/2

Complete 0.1 fn

39/4-5/2÷10/3=9/1

Complete 1.1 fn

-14/5-2/3×9/10=-17/5

Complete 1.2 fn

-571/12-103/3÷1442/37=-1357/28

Complete 2.1 fn

(1/3+29/3)×3/4=15/2

Comparisons

Ceil 0.4 in

438900 > 300000

Ceil 1.4 in

-809034 < 652031

Ceil 2.4 in

-910920+128402 < -370576+776268

Ceil 3.4 in

-267784÷2 > 897594÷(-2)

Point 0.3 dp

2.718 < 2.731

Point 0.4 dp

622.529-16.776 < 617.468-11.698

Point 2.4 dp

707.652+80.746 = 130.247+658.151

0.88×6.6 > 17.4÷3

16×8.4 > 94.73÷2.5

88.103 > -88.098

11.471 > -11.454

981.991 > -39.637

-13.362-2.149 > -95.098+79.575

Doted 2.4 dn

-111.085-450.361 < -871.599+548.167

Doted 3.3 dn

4.375×(-2.432) < 42.556÷(-4)

Improper 0.3 fp

5087/92 > 587/874

Improper 3.3 fp

129/2×2/129 < 190/3×56/95

Descent 0.1 fn

-1/2-1/2 < 1/1-1/5

Descent 0.2 fn

40/9÷(-60/67) < 5/2×(-12/35)

Descent 1.3 fn

103/241 < 12/17

Descent 2.2 fn

-7/86-9/86 < 1/5+2/15

Descent 3.1 fn

1/3×(-2/3) < 3/5×5/9

Descent 3.2 fn

-2/5÷8/97 < -92/11÷23/3

Equations

-x×(-30)=-900

-555+29×x=460

(-959-x)×44=-396

y+x=12

Rounding

Rounding 0.3 dp

71.733≈71.73

Rounding 3.3 dp

92×0.5≈46

Language Exercises

Russian Vocabulary 1.5

напер вес

Russian Vocabulary 3.4

ккорд

English Vocabulary 1.4

festi al

English Vocabulary 2.4

enor ous

Lexicon 1.4

campai n [crusade]

Infinitive 2.2

wake [wake]

14+

Recommended for adolescents from the age of fourteen

Integer Examples

Intellect 0.3 in

(900-3121)×(2100-2118)=39978

Intellect 1.3 in

-5956+26×2185=50854

Intellect 2.3 in

-5264×11-91×56=-63000

Intellect 3.3 in

-94798+87780÷(91+19)=-94000

25×(-19)=-475

495÷(-15)=-33

952÷(-34)×95=-2660

3×(36×(-40))=-4320

270÷3×(345÷5)=6210

Decimal Examples

Residual 1.3 dp

47÷8=5.875

Denary 0.4 dp

5.28÷(0.48×6.25)=1.76

0.85×20=17

5.28÷0.528=10

2.4×0.36=0.864

8.96×25×0.05=11.2

(1÷31.25)÷4=0.008

93.74+(0.894+1.356)×0.02=93.785

Definition 0.4 dp

(208.3-205.175)×(96.287+36.769)=415.8

Definition 1.4 dp

1.656÷41.4+695.533=695.573

Definition 2.4 dp

800×0.576-74.52÷43.125=459.072

Definition 3.3 dp

(0.521+0.007)÷(1.8+2.6)=0.12

Definition 3.4 dp

800.436-(39.298+325.202)÷7.29=750.436

Negatory 0.3 dn

-25.734+8×8.918=45.61

Negatory 0.4 dn

-158.08+3.6×107.8=230

Negatory 1.4 dn

-713.784+656.64÷0.512=568.716

Negatory 2.4 dn

841.234-122.4÷9.375-988.178=-160

Negatory 3.3 dn

-4.8÷(-0.564-1.936)÷0.064=30

Negatory 3.4 dn

241.665+(741.002-738.752)×16=277.665

Residual_ENG 1.3 dp

27÷12=2.25

Fraction Examples

Denominator 0.3 fn

-1978/209-(5242/209-20891/253)=12151/253

Denominator 2.3 fn

6/5-9349/277+149/5=-762/277

Denominator 3.3 fn

197/9+(604/9-5281/899)=74730/899

Fragment 0.3 fp

1049/37÷(1/5÷3/5)=3147/37

Fragment 3.3 fp

460/9×(17/22×77/68)=805/18

Limited 0.2 fp

(1/3+119/3)÷17/9=360/17

Limited 1.3 fp

1/2÷9/118+247/9=34/1

Limited 2.2 fp

255/11×(25/34-3/34)=15/1

Complete 0.2 fn

41/44-85/9÷748/63=3/22

Complete 1.3 fn

-2/3÷13/6-35/13=-3/1

Complete 2.2 fn

(1/5+1/5)÷7/15=6/7

Comparisons

Doted 0.4 dn

-263.871-336.129 < 196.831+403.169

Doted 3.4 dn

-81.34÷(-4.067) > 12.15×(-1.52)

Descent 0.3 fn

-65/12-197/48 < -23785/672+10215/224

Descent 2.3 fn

-619/142-7601/284 < 848/13-108/13

Descent 3.3 fn

-53/72×(-8307/106) > -61/3×(-93/122)

Equations

x²-5x=0

2x²=0

-5x²+10x=0

-x²-6x-9=0

8y-3x=50

y+x=76

x×20y=800

3y-2x=7

-3y×12x=-324

-y+x=3

-9y×x=900

-5x-5y=-5

Language Exercises

Russian Vocabulary 2.5

в ттметр

English Vocabulary 1.5

respons bility

English Vocabulary 2.5

signifi antly

English Vocabulary 3.4

equ valent

Lexicon 1.5

commer ial [trading]

Lexicon 2.4

mathem tics [maths]

Infinitive 1.3

rehear reheard [rehear]

Infinitive 3.2

premade [premake]

15+

Recommended for adolescents from the age of fifteen

Integer Examples

Logics 0.4 in

(14400÷(-10))÷12=-120

Logics 1.4 in

717×1000=717000

Logics 2.4 in

-1250÷(-25)×(-900)=-45000

Logics 3.4 in

(-400×(-18))÷(-8)=-900

Logics 4.4 in

364800÷(-20)÷(12×(-40))=38

Fraction Examples

Limited 0.3 fp

437/5×(7/17-48/323)=23/1

Limited 2.3 fp

350/19÷(79/133+1/7)=25/1

Complete 0.3 fn

-831/31÷(1/2-139/2)=277/713

Complete 2.3 fn

(191/209-37/209)×361/14=19/1

Equations

x²-94x+360=0

8x²=968

24x²-840x=0

-x²-41x+1220=0

23y×x=17112

x+y=760

53856y÷33x=7200

32y-9x=2553

-90y+36x=-7560

y-x=-100

3402x÷21y=-729

4y+54x=4680

Language Exercises

Russian Vocabulary 3.5

ц линдр

English Vocabulary 3.5

continuo sly

Lexicon 2.5

f shionable [trendy]

Infinitive 2.3

thrust [thrust]

16+

Recommended for adolescents from the age of fifteen

Equations

-390x²+380250x=0

29x²=3158100

963x²-315864x=0

-x²-260x+2981=0

y-x=70

38x×2y=2708640

157y-9x=57925

-y+x=530

-y+x=53

-10x×4y=-3149280

-53y-683x=65307

Language Exercises

Infinitive 3.3

forsaken [forsake]

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