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

6+1=7

Beginner 2.1 ip

10-2=8

Beginner 3.1 ip

1+2=3

Step-by-step Tasks

3+1=4

1+3=4

2+5=7

0+3=3

9+1=10

5-2=3

4-1=3

7-1=6

1-1=0

8-2=6

8-3=5

Recommended for children from six years

Integer Examples

7+10=17

12-1=11

20-8=12

5+4-3=6

Step-by-step Tasks

7+2=9

7+3=10

1+0=1

4+4=8

6+0=6

9+5=14

7+5=12

6+7=13

3+5=8

3+7=10

3+7=10

4+2=6

4+8=12

8+9=17

3+1=4

10+9=19

5+8=13

10-4=6

5-5=0

12-1=11

14-2=12

14-3=11

15-6=9

12-7=5

17-2=15

16-8=8

11-5=6

16-9=7

15-10=5

12-10=2

Recommended for children from seven years

Integer Examples

8-(1+6)=1

33+47=80

95-63=32

78+22=100

5+8+7=20

9-(10-3)=2

Step-by-step Tasks

10+10=20

0+0=0

10-10=0

11+2=13

3+10=13

4+7=11

5+5=10

19+19=38

15+11=26

25+6=31

27+3=30

17-6=11

19-11=8

3-2=1

11-3=8

14-4=10

12-5=7

26-16=10

27-17=10

16-6=10

1×6=6

2×6=12

2×7=14

9÷1=9

Comparisons

Natural 1.1 ip

1 < 10

Natural 2.1 ip

2+0 < 10-5

Language Exercises

Russian Vocabulary 1.1

од ванчик

Recommended for children from eight years

Integer Examples

9-(17-9)=1

892+54=946

392-202=190

20+703=723

77-3-22=52

18-(7+8)=3

11×9=99

0÷13=0

7×5=35

56+30=86

98-59=39

10+76=86

Step-by-step Tasks

12+8=20

28+2=30

8+12=20

21+19=40

40+50=90

4+16=20

18-1-3=14

17-8=9

24-14=10

21-19=2

14-6=8

29-9=20

60-30=30

3×9=27

8×2=16

6×4=24

10×1=10

5×10=50

10×5=50

5×8=40

6×6=36

8×6=48

7×7=49

1×6=6

5×4=20

9×8=72

8×10=80

9×3=27

0×9=0

5×2=10

9×10=90

12÷2=6

7÷1=7

6÷3=2

18÷2=9

40÷4=10

4÷4=1

30÷5=6

0÷4=0

10÷2=5

30÷6=5

30÷5=6

21÷7=3

24÷6=4

20÷4=5

64÷8=8

0÷8=0

72÷9=8

72÷8=9

80÷2=40

30÷10=3

Comparisons

8+2 > 6+1

31 > 18

72-23 < 60+30

9÷3 < 7×1

Equations

Linear 1.1 ip

10-x=1

Linear 2.1 ip

4÷x=2

Language Exercises

Russian Vocabulary 1.2

н уклюжий

Russian Vocabulary 2.1

п лёт

Russian Vocabulary 3.1

чер з

English Vocabulary 1.1

h ve

English Vocabulary 2.1

n ar

Lexicon 1.1

pa s [go]

Lexicon 2.1

pl yer [gambler]

Recommended for children from nine years

Integer Examples

79-49=30

877+123-0=1000

76-(4+40)=32

12÷(9÷3)×7=28

28×21=588

188÷2=94

14×35=490

20÷5×3=12

(8÷4)×2=4

90÷3÷(3×2)=5

59÷10=5(9)

2601+3664=6265

4393-1358=3035

6041-3545=2496

31×2=62

40÷2=20

55+3×10=85

24÷8+10×5=53

84÷7=12

41÷5=8(1)

Step-by-step Tasks

15×2=30

11×6=66

3×11=33

10×2=20

12×4=48

5×11=55

4×9=36

12×2=24

20×1=20

11×6=66

7×14=98

5×6=30

19×8=152

16×5=80

9×11=99

15×7=105

20×8=160

10×14=140

6×12=72

34÷2=17

55÷11=5

54÷3=18

48÷3=16

0÷4=0

95÷5=19

16÷2=8

64÷4=16

100÷10=10

54÷6=9

49÷7=7

66÷6=11

72÷8=9

40÷5=8

144÷9=16

28÷7=4

490÷10=49

135÷9=15

55÷11=5

Comparisons

100-0 > 83-16

446 > 81

289+183 < 938-217

35÷7 < 80÷5

Equations

Linear 1.2 ip

23+x=63

Linear 2.2 ip

x÷2=6

Linear 3.1 ip

4×x+2=10

Language Exercises

Russian Vocabulary 1.3

обн вление

Russian Vocabulary 2.2

комн та

Russian Vocabulary 3.2

шп он

English Vocabulary 3.1

fa m

10+

Recommended for children from ten years

Integer Examples

0+111=111

119800+123801=243601

691254-681381=9873

949282-152711=796571

763+(227-152)=838

952÷34=28

20×245=4900

8010÷10=801

3000÷3=1000

36÷4÷9=1

(120÷2)÷3=20

2×(10×5)×7=700

90÷6=15

120000+352877=472877

400000-229487=170513

160633+200447=361080

1886×3=5658

1000×72=72000

680÷4=170

92÷2-34=12

900÷10-46=44

336÷24+576÷36=30

20+(24-23)×10=30

810÷9=90

132÷7=18(6)

Comparisons

Natural 0.3 ip

608÷8 > 470÷10

Natural 1.4 ip

369715 > 191998

Natural 2.4 ip

624432-151195 < 677301+70597

Natural 3.3 ip

790÷10 < 2×100

Equations

3×(10-x)=6

x-507=148

x÷2=402

9+2×x=93

(x-1)×5=0

Rounding

Round 1.1 ip

372≈37

Round 1.2 ip

9156≈92

Round 2.1 ip

475+89≈56

Language Exercises

Russian Vocabulary 2.3

п недельник

English Vocabulary 1.2

t lk

English Vocabulary 2.2

mu t

Lexicon 1.2

ph ne [call]

Lexicon 2.2

l ss [privation]

Infinitive 1.1

smite smitten [smite]

11+

Recommended for children from the age of eleven

Integer Examples

Beginner 0.5 ip

783110+162887-150397=795600

Beginner 4.5 ip

912490-226129-86884=599477

Beginner 5.5 ip

479830-(650000-640891)=470721

-10+7=-3

880000-442636=437364

-6+10-1=3

1520÷19=80

1440÷12×63=7560

(450÷5)÷2=45

126÷(9÷3)×37=1554

516÷70=7(26)

22227×233=5178891

1479÷29=51

137×2+60÷2=304

4200-600÷20-3362=808

132÷11+8000=8012

5240-10×16×24=1400

319-171÷(550-379)=318

Numeracy 3.3 ip

(70+61)×(3822-3318)=66024

Divisor_ENG 1.3 ip

9504÷22=432

Remainder_ENG 1.3 ip

810÷67=12(6)

Decimal Examples

8.2-0.3-1=6.9

30.6+39.3+24=93.9

9.6-2.5=7.1

92.8-7.5=85.3

1.7+1.5+1.4=4.6

67.4+31.9-46.5=52.8

4.2-(8.9-6)=1.3

22.1+(9-0)=31.1

5.7÷1.5=3.8

17.5×1.6=28

96÷1.5=64

18.4÷2=9.2

Divisional_ENG 1.1 dp

12.8÷8=1.6

Fraction Examples

Numerator 1.1 fp

1/6+1/2=2/3

Comparisons

Natural 0.4 ip

212400÷59 < 697527÷51

13×16 < 35732÷2

-2-0 > -2-3

-3 < 2

9-4 > -6+10

2×(-5) < 4×(-2)

33.6 < 91.3

12.8+7.6 < 81.5-54.2

1/8 < 1/4

445/68 < 7/1

9/10-1/10 > 1/4+1/4

Equations

4×x+47=47

352÷(65-x)=176

x÷8+922=927

68÷(14+x)=2

(x-67)×39=897

x+5=3

x÷3=3

Rounding

93.1≈93

83.3-33.4≈50

434≈43

9364÷4≈23

255711≈256

822773≈823

215+852≈11

361600+911≈363

832÷2≈42

1004×8≈80

71678×13≈932

Language Exercises

Russian Vocabulary 1.4

экспл атация

Russian Vocabulary 3.3

сост заться

English Vocabulary 1.3

interes

English Vocabulary 2.3

str ggle

English Vocabulary 3.2

hu e

Lexicon 1.3

lly [join]

Infinitive 2.1

outrode [outride]

12+

Recommended for children from the age of twelve

Integer Examples

-7+7=0

-18+3=-15

-48-(-43-79)=74

-12+12=0

-93-5=-98

-11+19-19=-11

16-87+11=-60

4-(6+1)=-3

-10-(-3-6)=-1

51-(-17-18)=86

-(3-0)+(8+5)=10

(12+6)-(19-20)=19

-(60+49)+(79+11)=-19

220800÷1104=200

982×594=583308

960÷3=320

551×200=110200

250×2÷10=50

5600÷(224÷8)=200

109×(336÷8)÷14=327

28000×1250=35000000

60000÷30=2000

-20-96÷6÷8=-22

-96÷6-40=-56

-5×5-2×33=-91

-60+20÷(17-15)=-50

-6×(-3)×5=90

8×(-8)=-64

4×2×8=64

(-80÷2)÷(-4)=10

-27×4÷(-6×(-2))=-9

40000÷25=1600

Decimal Examples

Partitive 0.3 dp

94.08-(75.71-69.07)=87.44

Partitive 1.3 dp

12.29+80.11=92.4

Partitive 2.3 dp

54.76-3.58-6.23=44.95

Partitive 3.3 dp

83+(36.35-19.39)=99.96

-7.5+0.5=-7

-2.3-53.5-43.9=-99.7

0.6-7.5=-6.9

33.7-5.7=28

-1-1-4.8=-6.8

2.4-0.1-80.3=-78

2.9-(-1.8+3)=1.7

18+(-31.6+50.5)=36.9

48÷6=8

80.64÷4.2=19.2

0.9×10=9

2.25×2.4=5.4

2.24÷1.75=1.28

4×0.01=0.04

10.5×6×0.4=25.2

(10.3÷20.6)×13.6=6.8

41.4-(0.5+0.3)×2.5=39.4

Definition 1.1 dp

11.1+3.8×3=22.5

Definition 2.1 dp

2.8÷0.5-3×1.1=2.3

Definition 3.1 dp

83×(20.5-19.8)÷41.5=1.4

Negatory 1.1 dn

-32÷12.8+66=63.5

Negatory 2.1 dn

-46+14.4÷2-59.4=-98.2

Residual_ENG 1.1 dp

67÷5=13.4

Divisional_ENG 1.2 dp

0.14÷2.8=0.05

Fraction Examples

Numerator 0.1 fp

1/2-1/4+3/8=5/8

Numerator 0.2 fp

19/7-31/14+19/78=29/39

Numerator 1.2 fp

1/18+1/9=1/6

Numerator 2.1 fp

7/8-3/8-1/2=0/1

Numerator 2.2 fp

23/3+2/3-112/15=13/15

Numerator 3.1 fp

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

Numerator 3.2 fp

2/3+(25/3-13/20)=167/20

-1/8+(-1/8-1/8)=-3/8

2/3+1/3=1/1

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

1/6-(1/6+1/3)=-1/3

5/2÷25/9=9/10

32/25×95/16=38/5

15/2×4/5×2/9=4/3

2/8=1/4

24/72=1/3

27/10-1/3×57/10=4/5

Comparisons

15÷(-5) > -40÷10

873 > -188

85 > -81

759 > 754

7-40 < -63+70

910-282 > -391-339

-12×2 < 5×7

-920÷2 < -420÷3

90.4-17.9 > 99.7-61

7.25 = 7.25

51.46 < 51.47

73.296 = 73.296

570 < 697.732

98.73-1.14 > 7.39+0.53

Point 2.3 dp

86.162-52.642 = 97.534-64.014

99÷11 > 0.8×2.5

85÷17 < 90.09÷6.93

47.3 > -86

-54.66 < 6

-71.1 < -31

-98.21 < -69

35.1-5 < 15.9+46.8

93.12-5.13 > -0.52-20.72

Doted 3.1 dn

-0.8×2 > 40÷(-2)

Doted 3.2 dn

-84.7÷1.54 < 48.02÷(-7)

5/9 < 3/5

227/79 > 1/2

1541/416 > 5/13

421/93+206/93 < 175/19-17/19

Improper 2.3 fp

3/17+287/493 < 716/11-10858/319

Improper 3.1 fp

2/3×1/2 < 2/9÷1/3

Improper 3.2 fp

13/3÷49/12 < 1/2÷1/19

Descent 1.1 fn

1/6 < 7/9

Descent 1.2 fn

-253/30 < -129/16

Descent 2.1 fn

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

Equations

7÷x+1=-6

-66÷x=3

68-x=-2

-104+x=854

-x÷11=-1

-x×(-2)=-700

1-x÷5=0

x÷33-2=-4

-(-5-x)×2=-10

-44÷(-2-x)=22

Rounding

3.3≈3

51.99≈52

74.91≈74.9

59.997≈60

89.29-14.12≈75.2

3.977+18.018≈22

83÷9.1≈9

1.61×48.93≈78.8

Language Exercises

Russian Vocabulary 2.4

инц дент

English Vocabulary 3.3

cl mbing

Lexicon 2.3

to ards [to]

Infinitive 1.2

teach taught [teach]

Infinitive 3.1

outleap [outleap]

13+

Recommended for adolescents from the age of thirteen

Integer Examples

Conversant 0.4 in

-(2+338)+(202-832)=-970

Conversant 0.5 in

-207188-449552=-656740

Conversant 1.4 in

335+35=370

Conversant 2.4 in

-543-917+552=-908

Conversant 2.5 in

-987259+785779-38520=-240000

Conversant 3.4 in

856+(-119+194)=931

Conversant 3.5 in

-177674-(234978+201437)=-614089

Conversant 4.4 in

-(86+70)-(14+130)=-300

Conversant 4.5 in

(218460+0)+(862505-807963)=273002

20000÷100=200

-48×19+30×42=348

-90×7-21=-651

105×7-765÷153=730

407-48÷(-14-2)=410

-50÷10×(-20)=100

-14÷7=-2

80÷10÷2=4

(20×(-50))÷(-25)=40

-8×8×(-2×4)=512

2453463÷267=9189

Decimal Examples

Partitive 0.4 dp

246.738+60-150.738=156

Partitive 1.4 dp

11+151=162

Partitive 2.4 dp

9.226+380-334.3=54.926

Partitive 3.4 dp

237.038+(265.417+175.545)=678

Split 0.3 dn

-12-28=-40

Split 0.4 dn

-68.569-484.139-4.175=-556.883

Split 1.3 dn

-93.76+11=-82.76

Split 1.4 dn

581.172-141.613=439.559

Split 2.3 dn

-36.27+86.24-95.42=-45.45

Split 2.4 dn

448.696-466.3+31.2=13.596

Split 3.3 dn

62.85+(-56.6+55.19)=61.44

Split 3.4 dn

105.845-(-165.539+141.384)=130

9÷6=1.5

7.616÷0.112=68

3.75×4=15

31.68÷5.5=5.76

2.4×1.33=3.192

2.124÷2.4=0.885

79.596÷4.752=16.75

1.2÷40×70=2.1

1.344÷0.525÷6.4=0.4

(10.25÷51.25)×0.2=0.04

Denary 5.3 dp

3.78÷(0.224×93.75)=0.18

Definition 0.2 dp

(97.23-8.31)÷(1.14+13.68)=6

Definition 1.2 dp

90.68-1.6×12.5=70.68

Definition 1.3 dp

39.788-4.68÷2.08=37.538

Definition 2.2 dp

24.4+8×8.75×1.08=100

Definition 2.3 dp

51.038-48×0.6-11.004=11.234

Definition 3.2 dp

92.65÷(1.02+1.16)÷31.25=1.36

Negatory 0.1 dn

-47.7+(34-43)÷1.2=-55.2

Negatory 0.2 dn

25.37+1.8÷1.25-95.81=-69

Negatory 1.2 dn

-41.86÷1.82+25.47=2.47

Negatory 1.3 dn

77-43.2÷3=62.6

Negatory 2.2 dn

-73.46+3.36÷0.96×30=31.54

Negatory 2.3 dn

-25.28+6.4×0.005+55.931=30.683

Negatory 3.1 dn

-4×(65.3-69.3)×0.8=12.8

Negatory 3.2 dn

26.73-63.36÷(38.2-37.56)=-72.27

Residual_ENG 1.2 dp

88÷25=3.52

Divisional_ENG 1.3 dp

0.234÷6=0.039

Fraction Examples

Numerator 0.3 fp

73/9+(2675/549+1099/61)=31/1

Numerator 1.3 fp

1135/12-793/12=57/2

Numerator 2.3 fp

3/7+31/581+8094/83=98/1

Numerator 3.3 fp

3730/41-(749/9-12637/369)=42/1

Denominator 0.2 fn

39/5-243/35=6/7

Denominator 1.2 fn

1/2+7/10=6/5

Denominator 1.3 fn

-53495/666+13/18=-26507/333

Denominator 2.2 fn

-5/31+49/31-68/31=-24/31

Denominator 3.2 fn

-9/4-(4/3+443/100)=-601/75

1/5÷1/10=2/1

(3/2÷1/9)×11/3=99/2

12/19÷6/19=2/1

9/10÷9/40÷16/23=23/4

1/2×260/3÷130/27=9/1

1/7÷(2/5×5/2)=1/7

(2/3÷19/3)×95/41=10/41

114/1178=3/31

10/3-26/3÷13/4=2/3

1/26+3/13×1/2=2/13

27/4÷(1/2+1/4)=9/1

2/3÷1/6-3/2=5/2

61/8-15/4÷5/9=7/8

7/8×496/21+83/20=1489/60

Complete 2.1 fn

12/5÷(-1/3-11/3)=-3/5

Comparisons

Ceil 0.4 in

771000-619149 > -618427-30535

Ceil 1.4 in

-104464 > -559399

Ceil 2.4 in

-155769-529973 < 78000+610140

Ceil 3.4 in

-668800÷2 > -788012÷2

Point 0.3 dp

91.924÷6.566 > 0.622×22.5

Point 0.4 dp

551.044÷3.25 = 0.64×264.925

Point 2.4 dp

10+478.4 < 19.623+679.245

Point 3.3 dp

41.94÷3.495 < 62.5×0.64

Point 3.4 dp

754.8÷11.1 < 856.32÷5.352

Doted 0.3 dn

5.32×(-15) < 64.064÷16

Doted 1.3 dn

95 > -78

Doted 1.4 dn

-277.04 < -225.364

Doted 2.3 dn

-5.166-52.58 < 37.929+11.949

Doted 2.4 dn

-310.058-30.117 < 735.233-67.565

Doted 3.3 dn

-65.04÷(-1.355) > 15×(-3.201)

Improper 0.3 fp

256/993+560/993 < 1/2+46/3

Improper 3.3 fp

129/2×2/129 < 190/3×56/95

Descent 0.1 fn

-1/3÷(-3/5) > -2/5×(-1/2)

Descent 0.2 fn

-100/17+2/1 > -4/1-6/19

Descent 1.3 fn

33461/449 > 23705/449

Descent 2.2 fn

3/28-8/91 < -65/11+6/1

Descent 3.1 fn

-1/4÷(-1/2) > -1/4÷1/2

Descent 3.2 fn

-1/2×(-6/1) > 5/1×8/15

Equations

-(-x+764)×250=-1000

89-900÷x=-1

-60×(865-x)=540

y-x=1

Rounding

Rounding 0.3 dp

67.76÷29.683≈2.28

Rounding 3.3 dp

37.5÷1.25≈30

Language Exercises

Russian Vocabulary 1.5

щ колда

Russian Vocabulary 3.4

ккорд

English Vocabulary 1.4

there ore

English Vocabulary 2.4

i pression

Lexicon 1.4

motorc cle [moped]

Infinitive 2.2

shod [shoe]

14+

Recommended for adolescents from the age of fourteen

Integer Examples

Intellect 0.3 in

-398+42×2319=97000

Intellect 1.3 in

5832÷72+6855=6936

Intellect 2.3 in

-2726-50×22×75=-85226

Intellect 3.3 in

-94798+87780÷(91+19)=-94000

25×(-19)=-475

-160÷20=-8

-15×500÷(-2)=3750

-500÷(-25×2)=10

-83×(29×(-86))÷58=3569

Decimal Examples

55÷5=11

3.456÷15.36=0.225

27.625×32=884

17.199÷955.5=0.018

6.144÷8=0.768

8.96×25×0.05=11.2

3.36×(0.52×3.125)=5.46

Definition 0.3 dp

93.74+(0.894+1.356)×0.02=93.785

Definition 0.4 dp

100.006-453.6÷672÷7.5=99.916

Definition 1.4 dp

151.19+205.92÷0.88=385.19

Definition 2.4 dp

120+3.9×6.8×1.25=153.15

Definition 3.3 dp

32.05-0.045÷(0.5+0.4)=32

Definition 3.4 dp

30×(4.894+5.312)×1.6=489.888

Negatory 0.3 dn

18.28+81.328÷(93.353-70.353)=21.816

Negatory 0.4 dn

19.6÷0.875-1.6×5.6=13.44

Negatory 1.4 dn

-103.36÷16+873.055=866.595

Negatory 2.4 dn

-0.8×1.5+268.8÷4.8=54.8

Negatory 3.3 dn

(-0.5-0.3)×(-23.533-1.967)=20.4

Negatory 3.4 dn

704.398-547.2÷(1.197+1.803)=521.998

Residual_ENG 1.3 dp

36÷75=0.48

Fraction Examples

Denominator 0.3 fn

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

Denominator 2.3 fn

40169/448-97/3-182/3=-1495/448

Denominator 3.3 fn

83/234+(-1/42-1/252)=17/52

Fragment 0.3 fp

1030/33÷515/12÷8/7=7/11

Fragment 3.3 fp

(1/2×134/3)÷67/81=27/1

Limited 0.2 fp

2383/80+13/2×8/5=643/16

Limited 1.3 fp

1/2÷9/118+247/9=34/1

Limited 2.2 fp

(1/5+3/85)×629/98=74/49

Complete 0.2 fn

175/87×(-79/10-19/2)=-35/1

Complete 1.3 fn

-91/9-1/4×284/9=-18/1

Complete 2.2 fn

-(3/4+1/20)×65/2=-26/1

Comparisons

Doted 0.4 dn

599.73÷30 > 578.772÷46

Doted 3.4 dn

599.86÷(-29.993) > -57.8×13.2

Descent 0.3 fn

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

Descent 2.3 fn

-3339/256-20141/256 < -1/4-123/320

Descent 3.3 fn

-2353/110÷5249/80 > 1025/26÷(-29725/663)

Equations

10x²=0

10x²=160

4x²+24x=0

-x²+6x+16=0

x+y=19

x+y=105

28y÷7x=10

7x+10y=107

2x+6y=12

x+y=10

-144x÷4y=-108

-1x-y=19

Language Exercises

Russian Vocabulary 2.5

как ду

English Vocabulary 1.5

suffi iently

English Vocabulary 2.5

b sinessman

English Vocabulary 3.4

compl te

Lexicon 1.5

bl me [condemn]

Lexicon 2.4

deli hted [admiring]

Infinitive 1.3

underspend underspent [underspend]

Infinitive 3.2

foreseen [foresee]

15+

Recommended for adolescents from the age of fifteen

Integer Examples

-15232÷(-16)=952

209952÷(-162)=-1296

20×160÷(-400)=-8

(200000÷(-10))÷25=-800

Logics 4.4 in

-100×(10×10)×94=-940000

Fraction Examples

Limited 0.3 fp

1071/125÷(13/20-31/100)=126/5

Limited 2.3 fp

11932/947÷(4/45+1/9)=59660/947

Complete 0.3 fn

-3117/298-15/149×217/30=-1667/149

Complete 2.3 fn

-193/14÷(-1/11-4/77)=193/2

Equations

-2x²+26x+280=0

7x²=51772

20x²-1200x=0

x²-16x-80=0

182x÷14y=13

y-x=118

12y×x=72000

7y+40x=4263

-x-y=79

-y-x=-26

54720y÷24x=-6000

-40y-83x=11968

Language Exercises

Russian Vocabulary 3.5

заму

English Vocabulary 3.5

inv stigation

Lexicon 2.5

c mmitment [obligation]

Infinitive 2.3

light [light]

16+

Recommended for adolescents from the age of fifteen

Equations

2x²-540x-33488=0

50x²=1232450

-370x²-335590x=0

-x²+121x+1452=0

x+y=505

11y×2x=5017320

19x+220y=94907

-x+y=326

-y-x=-370

-2y×10x=-2160000

-6x-y=-2352

Language Exercises

Infinitive 3.3

run [run]

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