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

2+4=6

Beginner 2.1 ip

6-4=2

Beginner 3.1 ip

4+4=8

Step-by-step Tasks

3+1=4

1+4=5

1+6=7

2+3=5

2+1=3

3-2=1

2-1=1

7-4=3

2-1=1

5-2=3

3-3=0

Recommended for children from six years

Integer Examples

2+13=15

20-8=12

16-4=12

6-5+8=9

Step-by-step Tasks

8+2=10

9+3=12

8+2=10

4+7=11

4+6=10

9+5=14

1+4=5

7+6=13

3+7=10

5+7=12

7+8=15

4+6=10

8+2=10

9+7=16

2-1=1

6+10=16

1+10=11

8-4=4

9-5=4

11-2=9

13-3=10

5-2=3

14-6=8

13-7=6

10-5=5

9-8=1

10-8=2

16-9=7

15-0=15

16-10=6

Recommended for children from seven years

Integer Examples

8-6=2

40+15=55

75-21=54

36-22=14

19-2+1=18

1+(2+1)=4

Step-by-step Tasks

10+8=18

5+5=10

6+14=20

14+2=16

23+11=34

14+4=18

20+10=30

19+19=38

0+25=25

14+16=30

7+0=7

8-6=2

14-11=3

3-2=1

10-3=7

24-4=20

16-15=1

18-6=12

19-7=12

20-20=0

1×6=6

2×10=20

0×1=0

5÷1=5

Comparisons

Natural 1.1 ip

2 > 0

Natural 2.1 ip

2+8 > 2+3

Language Exercises

Russian Vocabulary 1.1

од ванчик

Recommended for children from eight years

Integer Examples

16+(2+2)=20

3+144=147

779-1=778

32+218=250

23-10+4=17

18-(7+8)=3

10×7=70

20÷4=5

8×7=56

72+17=89

99-89=10

20+60=80

Step-by-step Tasks

24+6=30

28+2=30

8+12=20

8+9=17

50+30=80

10+25=35

7+0+10=17

27-8=19

20-17=3

21-19=2

14-6=8

39-29=10

60-30=30

10×3=30

8×2=16

4×7=28

10×3=30

10×5=50

10×5=50

10×5=50

6×0=0

8×5=40

7×7=49

6×5=30

5×4=20

9×8=72

8×10=80

9×6=54

0×9=0

5×4=20

10×2=20

14÷2=7

20÷2=10

18÷3=6

18÷2=9

40÷4=10

4÷2=2

0÷5=0

0÷4=0

20÷2=10

48÷6=8

18÷6=3

28÷7=4

32÷4=8

70÷7=10

48÷8=6

35÷7=5

63÷9=7

35÷5=7

40÷2=20

100÷10=10

Comparisons

10÷10 < 6÷1

86 > 70

35+25 < 17+75

2×5 > 8÷4

Equations

Linear 1.1 ip

x+4=8

Linear 2.1 ip

x÷10=1

Language Exercises

Russian Vocabulary 1.2

г тара

Russian Vocabulary 2.1

чу ть

Russian Vocabulary 3.1

щ гол

English Vocabulary 1.1

nin

English Vocabulary 2.1

act r

Lexicon 1.1

e t [ingest]

Lexicon 2.1

h r [pronoun]

Recommended for children from nine years

Integer Examples

27+1=28

897+24-626=295

20+(23-15)=28

6÷2=3

7×4=28

744÷3=248

38×24=912

28÷4÷7=1

90÷(18÷2)=10

5×2×(6÷3)=20

46÷9=5(1)

2600+1978=4578

5356-4837=519

8747-4847=3900

45×2=90

74÷2=37

12÷6-2=0

26-60÷2÷15=24

64÷4=16

27÷3=9

Step-by-step Tasks

2×23=46

11×8=88

3×13=39

10×2=20

4×12=48

5×18=90

12×4=48

49×2=98

10×4=40

11×6=66

14×7=98

9×15=135

8×11=88

18×3=54

9×20=180

19×9=171

6×20=120

30×6=180

10×11=110

16÷2=8

22÷11=2

42÷3=14

30÷3=10

0÷4=0

85÷5=17

40÷10=4

21÷3=7

60÷30=2

60÷6=10

84÷7=12

140÷7=20

128÷8=16

60÷10=6

144÷9=16

28÷7=4

490÷10=49

72÷8=9

12÷4=3

Comparisons

45÷3 < 8×9

732 > 596

744-348 > 809-426

75÷3 < 82÷2

Equations

Linear 1.2 ip

23+x=63

Linear 2.2 ip

x÷8=1

Linear 3.1 ip

x÷5-2=0

Language Exercises

Russian Vocabulary 1.3

т пор

Russian Vocabulary 2.2

кла с

Russian Vocabulary 3.2

за тра

English Vocabulary 3.1

pla e

10+

Recommended for children from ten years

Integer Examples

570-23+355=902

198915+99636=298551

668531-18531=650000

671069-157263=513806

763+(227-152)=838

5×(6×10)=300

100×70=7000

240÷12=20

17×91=1547

36÷4÷9=1

(69÷3)÷23=1

8×4×(2×10)=640

37÷16=2(5)

120000+793277=913277

463429-240000=223429

191886-34940=156946

7925×4=31700

1379×70=96530

760÷5=152

40÷10+69=73

880÷8+426=536

158×6+540÷20=975

18+(2+4)×7=60

395÷5=79

172÷16=10(12)

Comparisons

Natural 0.3 ip

2×24 < 4×19

Natural 1.4 ip

897165 > 204909

Natural 2.4 ip

978592-119645 > 300438-238438

Natural 3.3 ip

720÷20 > 928÷29

Equations

x+3=4

410-x=100

897÷x=299

2×x-43=37

(x-1)×5=10

Rounding

Round 1.1 ip

372≈37

Round 1.2 ip

9178≈92

Round 2.1 ip

413+192≈61

Language Exercises

Russian Vocabulary 2.3

сост заться

English Vocabulary 1.2

m inly

English Vocabulary 2.2

b nd

Lexicon 1.2

u ban [municipal]

Lexicon 2.2

wid [broad]

Infinitive 1.1

forget forgot [forget]

11+

Recommended for children from the age of eleven

Integer Examples

Beginner 0.5 ip

1961+910910=912871

Beginner 4.5 ip

561273+249458-799031=11700

Beginner 5.5 ip

479830-(650000-640891)=470721

-2-6=-8

-670307-6323=-676630

-10+4-4=-10

500÷100=5

210÷14÷15=1

(8×750)÷3=2000

2×3648÷(128÷2)=114

436÷67=6(34)

8118×869=7054542

7033÷13=541

(100-27)×(20-9)=803

5694÷26-46=173

1633+1530÷85=1651

3659-34×20+1204=4183

492+360÷(59-57)=672

(136+1704)÷(53+867)=2

Divisor_ENG 1.3 ip

975÷13=75

Remainder_ENG 1.3 ip

477÷87=5(42)

Decimal Examples

1+(8-5)=4

9.2+(87.1-39.2)=57.1

9.6-2.5=7.1

23.4+21.6=45

8.4-1.2-2.2=5

67.4+31.9-46.5=52.8

9-(0.2+0.8)=8

84-(7.9+52)=24.1

35.2÷0.5=70.4

3.5×2.2=7.7

39.6÷0.8=49.5

2.3×3=6.9

Divisional_ENG 1.1 dp

95.2÷8=11.9

Fraction Examples

Numerator 1.1 fp

7/9-1/3=4/9

Comparisons

Natural 0.4 ip

935313-425313 > 48000+232893

2691×86 > 2×1274

5 = 5

-2 < -1

1+1 > -1-9

5÷(-5) > 2×(-3)

83.3 > 59.9

20.8+2.3 < 1.1+29.9

1/7 < 1/2

90/47 < 4/1

3/5-2/5 < 1/4+1/4

Equations

100÷(73-x)=4

900÷x+215=245

x÷463-1=0

76÷(18+x)=2

714÷(x+1)=51

-1-x=6

-3×(-x)=-9

Rounding

79.2≈79

94.7-16.4≈78

9×101≈91

3×1404≈42

263×2351≈618

844542≈845

1780+667≈24

659654+74041≈734

988÷13≈8

1004×8≈80

75209×6≈451

Language Exercises

Russian Vocabulary 1.4

альб трос

Russian Vocabulary 3.3

ув жать

English Vocabulary 1.3

loo ely

English Vocabulary 2.3

st ff

English Vocabulary 3.2

s uare

Lexicon 1.3

stuf [matter]

Infinitive 2.1

see [see]

12+

Recommended for children from the age of twelve

Integer Examples

-(10+6)+(6+0)=-10

6-3=3

-50+23=-27

-9-7=-16

-10-10=-20

15+8-4=19

28+70-92=6

-3-(9-2)=-10

0-(-2-16)=18

33+(-37+1)=-3

(8-0)-(3-4)=9

-(14-20)-(19-10)=-3

(72-90)-(44+28)=-90

10720÷(62042÷926)×25=4000

352×301=105952

340000÷200=1700

889320÷2=444660

1000÷4÷25=10

216÷(18×2)=6

192500÷(100÷2)÷110=35

4130×4059=16763670

71766÷81=886

-12÷2-75÷3=-31

-20+5×2=-10

23+24÷4+41=70

65+21÷(26-5)=66

-4×3×(14÷2)=-84

-60÷(-3)=20

-48÷(-2)÷4=6

(36÷(-2))÷2=-9

-2×(48÷(-6))÷8=2

57000÷95=600

Decimal Examples

Partitive 0.3 dp

49.36-38.41-8.02=2.93

Partitive 1.3 dp

8.6+48.12=56.72

Partitive 2.3 dp

77.66-41.09+38.06=74.63

Partitive 3.3 dp

84.01-(77.52-25.51)=32

-2.2-2.2-1.3=-5.7

-18+5.6+82.2=69.8

6.3-4.4=1.9

-87.1-7=-94.1

-1.9+0.6+6.3=5

21.5+50.7-13.9=58.3

-8+(-7.7+5.7)=-10

8.9-(-26.1+23.8)=11.2

14÷10=1.4

10.08÷0.35=28.8

1.6×0.5×40=32

26×0.37=9.62

43.2÷72=0.6

4×0.01=0.04

1÷2.5×52=20.8

(6.9÷69)÷0.5=0.2

41.4-(0.5+0.3)×2.5=39.4

Definition 1.1 dp

14.3-10÷0.8=1.8

Definition 2.1 dp

54+0.5×2.6+2.9=58.2

Definition 3.1 dp

26.9-(84.1-81.1)×6.6=7.1

Negatory 1.1 dn

-99+1.9×24=-53.4

Negatory 2.1 dn

-91+4.5×11.4-29.6=-69.3

Residual_ENG 1.1 dp

64÷5=12.8

Divisional_ENG 1.2 dp

14.4÷2.4=6

Fraction Examples

Numerator 0.1 fp

1/4-1/4+1/7=1/7

Numerator 0.2 fp

183/19-(2/3+25/3)=12/19

Numerator 1.2 fp

74/11-62/33=160/33

Numerator 2.1 fp

1/3-2/9+2/3=7/9

Numerator 2.2 fp

37/8-13/8+50/77=281/77

1/6+(1/6+4/9)=7/9

7/24+(11/24+1/4)=1/1

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

5/9+1/9=2/3

1/8-4/5-1/5=-7/8

-4/5-(-2/5-1/5)=-1/5

3/2×10/7=15/7

92/7÷460/21=3/5

3/5×10/9÷6/5=5/9

132/30=22/5

828/24=69/2

27/10-1/3×57/10=4/5

Comparisons

30+23 > -1-8

-410-222 < -128-3

59 = 59

-520 < 700

-25-23 < 10+0

350+507 = 879-22

-84÷(-2) > 7×(-3)

828÷(-138) > 16×(-6)

16.7+3.8 > 14.6+5.8

34.13+15.87 < 19.71+53.11

81.89 > 51.14

75.249 > 0.089

533.338 > 450.065

5.76+0.27 < 45-15

69.162-67.374 < 1.309+34.691

14.5×6.8 > 27×0.5

1.6×11.25 < 81÷4.05

47.3 > -86

-97.85÷1.03 < 95.04÷(-3.52)

-100 < -92.7

-24.65 < 24.63

-91+96.7 > -10.7-9.2

-6.8-13.84 > 24.28-78.3

Doted 3.1 dn

-67.1÷(-1.1) > 36×(-1.7)

Doted 3.2 dn

29.7÷(-1.35) > -11.2×2.5

1/2×2/3 > 3/5×1/3

27/28 > 10/13

190/261 < 256/297

2/29+19/87 < 3/4+187/36

Improper 2.3 fp

65/213+14/213 < 773/8-373/8

Improper 3.1 fp

1/2×4/5 > 3/5×5/9

Improper 3.2 fp

3/46×4/3 < 385/46×31/55

Descent 1.1 fn

3/4 > -2/5

Descent 1.2 fn

-264/49 < 125/17

Descent 2.1 fn

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

Equations

-x÷(-2)=-1

19×(x+53)=-76

x+98=44

-x-561=409

x×(-8)=-80

-x÷(-4)=97

-1+x÷5=1

x÷33-2=-4

-4÷(-2+x)=-4

2×(71+x)=-30

Rounding

11.2≈11

19.91÷5≈4

0.66≈0.7

52.701≈52.7

75.02-32.53≈42.5

3.972+2.712≈6.68

83÷9.1≈9

89.1÷9.48≈9.4

Language Exercises

Russian Vocabulary 2.4

напр вление

English Vocabulary 3.3

incl de

Lexicon 2.3

s ider [arachnid]

Infinitive 1.2

mistake mistaken [mistake]

Infinitive 3.1

see [see]

13+

Recommended for adolescents from the age of thirteen

Integer Examples

Conversant 0.4 in

-74-280+927=573

Conversant 0.5 in

303217-(0-660000)=963217

Conversant 1.4 in

78-280=-202

Conversant 2.4 in

-543-917+552=-908

Conversant 2.5 in

278000-101822+61000=237178

Conversant 3.4 in

225+(429-110)=544

Conversant 3.5 in

181625-(-153365-643000)=977990

Conversant 4.4 in

(530-357)-(750+291)=-868

Conversant 4.5 in

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

5636374÷587=9602

52÷2-236=-210

10×2+312=332

159+4×6+181=364

326-(-37-39)÷4=345

(4×(-25))÷(-20)=5

-480÷(-40)=12

-36×(-2)×9=648

(-770÷2)÷5=-77

20×(-26÷13)×(-8)=320

1579107÷183=8629

Decimal Examples

Partitive 0.4 dp

78.4+(378.278+125.791)=582.469

Partitive 1.4 dp

399.582+9.241=408.823

Partitive 2.4 dp

246.005+454.479+249.2=949.684

Partitive 3.4 dp

507.389-(334.147+116.782)=56.46

Split 0.3 dn

-87.46+(-90+98.79)=-78.67

Split 0.4 dn

-553.402-449.17+193.209=-809.363

Split 1.3 dn

-44.39-35.61=-80

Split 1.4 dn

-560+242.697=-317.303

Split 2.3 dn

59.44+16.07-80=-4.49

Split 2.4 dn

-321.327+225.967-444.551=-539.911

Split 3.3 dn

62.85+(-56.6+55.19)=61.44

Split 3.4 dn

-572.502-(-160.053+0)=-412.449

77÷28=2.75

10.368÷32=0.324

3.75×0.04=0.15

0.5×0.12÷30=0.002

0.8×54.675=43.74

2.124÷2.4=0.885

1.38÷0.69=2

1.2÷40×70=2.1

35.64÷88÷1.35=0.3

1.2÷(15×2)=0.04

(24.48÷61.2)÷0.883=0.453

Definition 0.2 dp

2.5÷(0.72+1.78)×9=9

Definition 1.2 dp

29.2-2.72÷13.6=29

Definition 1.3 dp

1.445÷10.625+61.473=61.609

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

(19.41+33.03)÷(89.02-87.64)=38

Negatory 0.1 dn

(12.8+24)÷(-42.2-31.4)=-0.5

Negatory 0.2 dn

0.64×(69-74)×0.25=-0.8

Negatory 1.2 dn

-7×4.4+11.44=-19.36

Negatory 1.3 dn

-23.46÷93.84-89.75=-90

Negatory 2.2 dn

-6+0.5×10.24×18.75=90

Negatory 2.3 dn

-25.28+6.4×0.005+55.931=30.683

Negatory 3.1 dn

-86.9+81÷(67-75.1)=-96.9

Negatory 3.2 dn

55.7+(-2.28-0.72)×1.9=50

Residual_ENG 1.2 dp

50÷25=2

Divisional_ENG 1.3 dp

5.04÷0.375=13.44

Fraction Examples

Numerator 0.3 fp

811/19+(405/19-1035/149)=8501/149

Numerator 1.3 fp

56/13+204/13=20/1

Numerator 2.3 fp

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

Numerator 3.3 fp

1/2+(15/2+817/141)=1945/141

-58/9+4/9=-6/1

8/13-112/13=-8/1

-380/13+770/13=30/1

1/2-788/95+17/2=67/95

Denominator 3.2 fn

36/5+(-151/30+79/30)=24/5

1/5÷1/10=2/1

1/10×20/3÷4/3=1/2

11/3÷1/6=22/1

1/2÷3/32×117/16=39/1

12/13×39/2÷180/7=7/10

Fragment 3.1 fp

(3/2÷1/4)×1/3=2/1

Fragment 3.2 fp

(464/25÷116/5)×25/28=5/7

Reduction 1.3 fp

2460/2697=820/899

Limited 0.1 fp

3/2×14/9+2/3=3/1

Limited 1.2 fp

51/2÷85/6+443/40=103/8

Limited 2.1 fp

(1/2+1/6)÷2/3=1/1

Complete 0.1 fn

-(1/2+1/10)×7/6=-7/10

Complete 1.1 fn

-7/10÷14/5-1/2=-3/4

Complete 1.2 fn

8/7-428/9÷1498/45=-2/7

Complete 2.1 fn

-13/3÷(-2/5-1/10)=26/3

Comparisons

Ceil 0.4 in

-2×(-18) < 9000×6

Ceil 1.4 in

-33554 < 178325

Ceil 2.4 in

121236-219349 < 906719-76722

Ceil 3.4 in

-19×4 < -800000÷(-10)

Point 0.3 dp

54.048÷3.378 < 12×3.08

Point 0.4 dp

7.28×7.5 < 1.875×240

Point 2.4 dp

990.111-5.414 > 991.834-127.012

Point 3.3 dp

0.75×29.44 < 18.785×4.8

Point 3.4 dp

3.36×6.75 < 102.4×3.125

Doted 0.3 dn

-8.801+91.035 > 81.571-58.819

Doted 1.3 dn

10.084 < 12.192

Doted 1.4 dn

981.991 > -39.637

Doted 2.3 dn

70.664-35.885 > 1.631+33.128

Doted 2.4 dn

48.789+522.414 > -118.102-318.831

Doted 3.3 dn

-52.38÷(-1.746) > 97.648÷5.744

Improper 0.3 fp

473/10 < 11159/150

Improper 3.3 fp

11/47÷11/842 > 201/235÷134/155

Descent 0.1 fn

5/6 > -5/8

Descent 0.2 fn

-5/2+2/1 < 11/2-19/9

Descent 1.3 fn

27641/566 < 55238/849

Descent 2.2 fn

11/3+47/10 > -81/55-221/77

Descent 3.1 fn

-4/5×(-3/4) < -1/2÷(-3/4)

Descent 3.2 fn

-1/4×4/27 > 15/52×(-91/27)

Equations

680+x=10

-38×x-112=-872

-(-x-855)×40=-880

x+y=8

Rounding

Rounding 0.3 dp

71.733≈71.73

Rounding 3.3 dp

18.727÷27.295≈0.69

Language Exercises

Russian Vocabulary 1.5

т нцор

Russian Vocabulary 3.4

талантл вый

English Vocabulary 1.4

rema ning

English Vocabulary 2.4

alc hol

Lexicon 1.4

m llionth [count]

Infinitive 2.2

hung [hang]

14+

Recommended for adolescents from the age of fourteen

Integer Examples

Intellect 0.3 in

(86+14)×(23+227)=25000

Intellect 1.3 in

-2772÷18-5199=-5353

Intellect 2.3 in

-100×44+35×212=3020

Intellect 3.3 in

(3527-3027)×(400-395)=2500

Logics 0.3 in

10000÷10÷(-25×(-4))=10

20×(-10)=-200

-2×250÷25=-20

(4×400)÷(-100)=-16

16÷(-4)×(-40×(-15))=-2400

Decimal Examples

51÷8=6.375

1.28×46.875=60

2.75×0.004=0.011

0.506÷5.06=0.1

0.5×0.034=0.017

1.7×64÷68=1.6

(810÷28.125)×0.25=7.2

Definition 0.3 dp

40.128-0.864÷1.6=39.588

Definition 0.4 dp

310×0.104+48.75×12.672=650

Definition 1.4 dp

3.52×0.05+530.528=530.704

Definition 2.4 dp

120+3.9×6.8×1.25=153.15

Definition 3.3 dp

29.08-(28.195-25.995)÷27.5=29

Definition 3.4 dp

(566.687-566.607)÷(0.532+1.468)=0.04

Negatory 0.3 dn

63×0.352+54.075=76.251

Negatory 0.4 dn

11.088÷(0.5-0.7)÷0.8=-69.3

Negatory 1.4 dn

-103.36÷16+873.055=866.595

Negatory 2.4 dn

475.958+720÷11.25÷51.2=477.208

Negatory 3.3 dn

-72.163-(78.991-85.591)÷1.5=-67.763

Negatory 3.4 dn

20+(0.534+0.066)÷0.003=220

Residual_ENG 1.3 dp

92÷16=5.75

Fraction Examples

Denominator 0.3 fn

101/273+26605/819+6452/117=88/1

Denominator 2.3 fn

61057/630-1073/108-12913/756=699/10

Denominator 3.3 fn

-2081/47+(91/423+53773/846)=39/2

Fragment 0.3 fp

3/4÷3/10÷5/94=47/1

Fragment 3.3 fp

1209/37÷(130/17÷390/17)=3627/37

Limited 0.2 fp

649/32÷(7/9-23/72)=177/4

Limited 1.3 fp

3/5×61/51+37/255=44/51

Limited 2.2 fp

377/15×(1/6+17/78)=29/3

Complete 0.2 fn

-5/57+153/19÷459/44=13/19

Complete 1.3 fn

-1196/21+14/33÷98/85=-4357/77

Complete 2.2 fn

-9/40×(-1/8-31/8)=9/10

Comparisons

Doted 0.4 dn

-1000 < 520

Doted 3.4 dn

43.2×(-13) < 19.5×28.8

Descent 0.3 fn

9/13 < 16142/247

Descent 2.3 fn

553/9-7025/639 > 97/71-31/2

Descent 3.3 fn

17/24×(-1432/15) < -15/26×10/9

Equations

-x²-3x-2=0

5x²=80

x²+5x=0

-x²-3x+10=0

10y+10x=200

x+y=180

4x÷4y=1

2y+5x=70

x-y=5

-x+y=10

-2y×2x=-400

7x-10y=140

Language Exercises

Russian Vocabulary 2.5

в ттметр

English Vocabulary 1.5

em hasis

English Vocabulary 2.5

d sappointed

English Vocabulary 3.4

appre iate

Lexicon 1.5

pro essional [vocational]

Lexicon 2.4

wo nded [injured]

Infinitive 1.3

rehear reheard [rehear]

Infinitive 3.2

speed [speed]

15+

Recommended for adolescents from the age of fifteen

Integer Examples

500×(-200)÷800=-125

-940×(-600)=564000

40×83×(-90)=-298800

1000÷(2000÷20)=10

-830760÷(-43)÷(78150÷(-7815))=-1932

Fraction Examples

Limited 0.3 fp

(1/4-1/84)÷155/897=299/217

Limited 2.3 fp

11932/947÷(4/45+1/9)=59660/947

Complete 0.3 fn

-4/5×105/152-131/399=-37/42

Complete 2.3 fn

-4375/487×(-1/35-3/70)=625/974

Equations

-2x²+26x+280=0

16x²=40000

40x²-2120x=0

-x²+120x-1100=0

x+y=150

y+x=1296

36x÷9y=3

32y-9x=2553

68640x÷77y=624

-y-x=-4

-2160x÷72y=-60

-31y-x=-1509

Language Exercises

Russian Vocabulary 3.5

н верх

English Vocabulary 3.5

conv nient

Lexicon 2.5

ind pendence [liberty]

Infinitive 2.3

spread [spread]

16+

Recommended for adolescents from the age of fifteen

Equations

2x²-544x+25134=0

231x²=1006236

106x²+52788x=0

-3x²+657x-35502=0

x+y=505

38x×2y=2708640

48y-x=43360

18480y÷88x=525

x-y=-26

2y×2x=-112320

239y-9x=-98470

Language Exercises

Infinitive 3.3

forewent [forego]

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