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

7-6=1

Beginner 3.1 ip

7+2=9

Step-by-step Tasks

1+1=2

1+3=4

2+5=7

1+0=1

9+1=10

5-2=3

3-1=2

5-3=2

9-1=8

4-2=2

8-3=5

Recommended for children from six years

Integer Examples

7+3=10

20-3=17

9-4=5

10-7+2=5

Step-by-step Tasks

4+2=6

9+3=12

1+0=1

4+8=12

0-0=0

5+9=14

6+2=8

7+6=13

3+8=11

5+7=12

9+1=10

2+7=9

8+9=17

8+9=17

5-4=1

2+10=12

7+10=17

10-4=6

9-5=4

10-3=7

13-3=10

14-3=11

13-6=7

14-7=7

1-1=0

17-8=9

10-8=2

13-9=4

0-0=0

16-10=6

Recommended for children from seven years

Integer Examples

10+(9-9)=10

30+57=87

100-55=45

49-29=20

20-3-14=3

6+(7-3)=10

Step-by-step Tasks

9+2=11

1+9=10

6+14=20

11+2=13

0+13=13

0+14=14

10+15=25

12+17=29

15+11=26

25+6=31

27+3=30

10-9=1

14-11=3

3-2=1

19-13=6

11-4=7

12-5=7

19-16=3

19-7=12

17-17=0

1×1=1

2×10=20

1×3=3

5÷1=5

Comparisons

Natural 1.1 ip

1 = 1

Natural 2.1 ip

9-7 < 2+4

Language Exercises

Russian Vocabulary 1.1

ч ловек

Recommended for children from eight years

Integer Examples

4+11=15

233+69=302

694-274=420

32+218=250

81-6-22=53

18-(7+8)=3

10×7=70

78÷13=6

8×7=56

32+51=83

78-15=63

97-45=52

Step-by-step Tasks

24+6=30

16-10=6

22+8=30

19+12=31

30+60=90

10+25=35

19-19+0=0

27-8=19

20-12=8

19-9=10

6-5=1

39-29=10

60-30=30

3×5=15

2×0=0

4×5=20

10×1=10

8×5=40

7×5=35

5×10=50

10×6=60

9×6=54

3×7=21

6×3=18

5×2=10

8×6=48

8×10=80

9×4=36

9×9=81

10×8=80

1×10=10

12÷2=6

16÷2=8

12÷3=4

6÷3=2

40÷4=10

8÷1=8

25÷5=5

18÷2=9

20÷2=10

0÷6=0

48÷6=8

21÷7=3

0÷4=0

70÷7=10

64÷8=8

60÷6=10

45÷9=5

35÷5=7

70÷7=10

80÷10=8

Comparisons

7-4 > 1+0

96 > 92

35+25 < 17+75

10÷5 > 4÷4

Equations

Linear 1.1 ip

1+x=7

Linear 2.1 ip

x×4=8

Language Exercises

Russian Vocabulary 1.2

н рочно

Russian Vocabulary 2.1

п лёт

Russian Vocabulary 3.1

восем

English Vocabulary 1.1

r d

English Vocabulary 2.1

a ay

Lexicon 1.1

e t [ingest]

Lexicon 2.1

h r [pronoun]

Recommended for children from nine years

Integer Examples

93-20=73

897+24-626=295

79+(18+3)=100

42÷14=3

28×14=392

696÷2=348

70÷35=2

8×5÷4=10

3×(4×2)=24

72÷(3×2)÷4=3

59÷10=5(9)

5811+3090=8901

3799-2000=1799

4900+1028=5928

14×7=98

30÷6=5

46+2×11=68

26-60÷2÷15=24

99÷3=33

17÷8=2(1)

Step-by-step Tasks

2×17=34

11×2=22

3×17=51

20×3=60

12×4=48

20×5=100

4×9=36

20×5=100

5×16=80

6×20=120

7×17=119

9×10=90

19×8=152

2×21=42

12×9=108

6×14=84

10×16=160

20×19=380

10×11=110

8÷2=4

0÷11=0

51÷3=17

2÷2=1

0÷4=0

95÷5=19

40÷2=20

64÷4=16

90÷30=3

12÷6=2

84÷7=12

4÷4=1

160÷8=20

40÷5=8

108÷9=12

98÷7=14

420÷20=21

135÷9=15

32÷4=8

Comparisons

20 > 18

518 > 340

72+174 < 680-264

50÷5 < 4×13

Equations

Linear 1.2 ip

96-x=13

Linear 2.2 ip

x÷2=30

Linear 3.1 ip

x×2+2=6

Language Exercises

Russian Vocabulary 1.3

п стух

Russian Vocabulary 2.2

дежда

Russian Vocabulary 3.2

гр жданин

English Vocabulary 3.1

c r

10+

Recommended for children from ten years

Integer Examples

975-21-84=870

82493+27507=110000

676000-66000=610000

186902+813098=1000000

572-(380+92)=100

588÷7=84

20×245=4900

9800÷8=1225

52×81=4212

30×20÷24=25

(25×40)÷20=50

800÷2÷(5×8)=10

136÷18=7(10)

374891+205109=580000

157910-66725=91185

191886-34940=156946

4702×6=28212

1900×26=49400

1000÷4=250

(41-37)×(10+5)=60

880÷8+426=536

151-544÷34+292=427

17-39÷(10+29)=16

810÷9=90

124÷18=6(16)

Comparisons

Natural 0.3 ip

740-15 > 869-389

Natural 1.4 ip

391473 < 539839

Natural 2.4 ip

764825-34825 > 626890-387550

Natural 3.3 ip

5×4 < 460÷2

Equations

8÷x+2=3

x-250=240

330÷x=33

78-x×3=15

(x+1)×3=6

Rounding

Round 1.1 ip

106≈11

Round 1.2 ip

1953≈20

Round 2.1 ip

960-119≈84

Language Exercises

Russian Vocabulary 2.3

независ мость

English Vocabulary 1.2

range

English Vocabulary 2.2

ra ely

Lexicon 1.2

pi k [rose-color]

Lexicon 2.2

e ch [both]

Infinitive 1.1

sand-cast sand-cas [sand-cast]

11+

Recommended for children from the age of eleven

Integer Examples

Beginner 0.5 ip

10000+(495252+24826)=530078

Beginner 4.5 ip

561273+249458-799031=11700

Beginner 5.5 ip

990636-(121295+199341)=670000

Conversant 1.1 in

-6+3=-3

Conversant 1.5 in

-176346+366346=190000

8+0-9=-1

26×10×(32÷2)=4160

50×6÷5=60

120÷(15÷3)=24

10×(69÷3)×10=2300

911÷30=30(11)

8648×270=2334960

7479÷27=277

(39+10)×(10+9)=931

1984+(75+277)÷22=2000

132÷11+8000=8012

5008-576×69÷23=3280

864-(132+24)÷2=786

6428-(5842-5678)×27=2000

Divisor_ENG 1.3 ip

9504÷22=432

Remainder_ENG 1.3 ip

477÷87=5(42)

Decimal Examples

5.4+1.6=7

33.6+13+53.4=100

9.6-2.5=7.1

63.9-37.9=26

1.7+1.5+1.4=4.6

46.1+64.8-85.4=25.5

1.2+(0.9+5)=7.1

21.6+(22.2+50.4)=94.2

0.3÷0.2=1.5

8×2.4=19.2

28.5÷1.5=19

2.3×3=6.9

Divisional_ENG 1.1 dp

3.2÷2=1.6

Fraction Examples

Numerator 1.1 fp

9/10-3/10=3/5

Comparisons

Natural 0.4 ip

935313-425313 > 48000+232893

104×17 < 25×72

-7 < -2

7 < 10

-4+10 > 2-8

-2×(-5) > -3÷(-3)

76 = 76

98.1-22.4 < 84.4-5.9

1/5 < 3/4

81/23 > 38/69

9/10-1/10 > 4/5-2/5

Equations

100÷(73-x)=4

900÷x+215=245

180-720÷x=0

(19+x)×4=76

(x-12)×189=378

-1+x=-8

-x÷3=2

Rounding

84.8≈85

19.1-18.1≈1

691≈69

304+2279≈26

535855≈536

240839≈241

9959-168≈98

965026-242853≈722

820÷4≈21

4136÷8≈5

870504÷152≈6

Language Exercises

Russian Vocabulary 1.4

вер вание

Russian Vocabulary 3.3

прис гать

English Vocabulary 1.3

contin e

English Vocabulary 2.3

st ff

English Vocabulary 3.2

s ek

Lexicon 1.3

un form [outfit]

Infinitive 2.1

misteach [misteach]

12+

Recommended for children from the age of twelve

Integer Examples

6-8+7=5

-11-0=-11

22-(60-34)=-4

-6-6=-12

90-20=70

-20+9+1=-10

-36+10-42=-68

0+(9-10)=-1

3+(-15+9)=-3

-52-(-74-18)=40

(6-10)+(8+0)=4

-(9+1)-(10+0)=-20

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

7560÷42=180

100×142=14200

636004÷2=318002

430×220=94600

384÷48×403=3224

80×(2×25)=4000

2×(4×5)×50=2000

25348×3347=84839756

71766÷81=886

-20-96÷6÷8=-22

-20+5×2=-10

-5×5-2×33=-91

(9+3)×(5+2)=84

2×3×5=30

-60÷(-3)=20

45÷(-5)×9=-81

(-5×(-12))÷(-10)=-6

-5×(6÷3)×9=-90

12000÷60=200

Decimal Examples

Partitive 0.3 dp

84.72-(22.47+26.2)=36.05

1.07+25=26.07

61.65+7+8.39=77.04

81.88-(16+24)=41.88

-7.5+0.5=-7

-2.3-53.5-43.9=-99.7

-4+2.6=-1.4

16.7+5=21.7

-1.9+0.6+6.3=5

-95.2+87.5-35.5=-43.2

5-(5.1-4.5)=4.4

3.7-(-89.9-5)=98.6

52÷4=13

0.51÷3=0.17

0.5×5.2÷2=1.3

1.75×0.8=1.4

46.08÷1.44=32

5×0.36=1.8

1÷2.5×52=20.8

(10.3÷20.6)×13.6=6.8

41.4-(0.5+0.3)×2.5=39.4

Definition 1.1 dp

46.6-2.5×4=36.6

Definition 2.1 dp

23.4+1.2×45-50=27.4

Definition 3.1 dp

26.2-(15+55.4)÷11=19.8

Negatory 1.1 dn

-32÷12.8+66=63.5

Negatory 2.1 dn

58+8÷2.5÷2=59.6

Residual_ENG 1.1 dp

18÷3=6

Divisional_ENG 1.2 dp

12÷3.2=3.75

Fraction Examples

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

1/35+(6/35+1/45)=2/9

2/3+307/75=119/25

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

39/5-29/5-82/75=68/75

Numerator 3.1 fp

4/5-(4/5-7/10)=7/10

Numerator 3.2 fp

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

2/5+1/2=9/10

-4/5+7/10=-1/10

2/3+1/3-6/7=1/7

1/3+(1/6-1/4)=1/4

42/5÷21/5=2/1

33/2÷99/26=13/3

1/2÷3/4÷5/3=2/5

20/8=5/2

399/19=21/1

35/4÷7/8-14/3=16/3

Comparisons

30+23 > -1-8

646 > -545

-9 < 10

-892 < -756

-37-2 < 39-37

-44+961 > 8+2

-11×8 < 96÷(-2)

892÷(-4) < 369÷(-3)

38.4 > 1.7

57.19÷19 > 1.25×2.4

50 > 42.67

63.298 > 40

190.863 < 436.083

81.45-18.25 > 1.87+0.35

Point 2.3 dp

6.675+59.134 > 89-23.199

Point 3.1 dp

67.6÷4 < 73.1÷4.3

Point 3.2 dp

1.6×11.25 < 81÷4.05

Doted 0.1 dn

-26.8-14.6 = 20.1-61.5

Doted 0.2 dn

-4.5×(-4) < -61.2÷(-2.04)

Doted 1.1 dn

27 > -32.8

Doted 1.2 dn

44 > -43.4

Doted 2.1 dn

-7.7+34.7 < -15.5+42.7

Doted 2.2 dn

-6.8-13.84 > 24.28-78.3

Doted 3.1 dn

-67.2÷1.6 > -68.4÷0.8

Doted 3.2 dn

-95.76÷(-23.94) = -43.4÷(-10.85)

Improper 0.1 fp

3/4 < 1/1

Improper 0.2 fp

7/10×60/7 > 2/5×45/16

Improper 1.3 fp

641/220 < 11698/121

Improper 2.2 fp

17/2-81/10 < 11/2-23/6

Improper 2.3 fp

156/5+12237/215 > 4001/43-657/43

Improper 3.1 fp

1/5÷7/10 < 2/3×1/2

Improper 3.2 fp

15/2÷45/38 = 3/4÷9/76

Descent 1.1 fn

1/6 > 1/10

Descent 1.2 fn

-64/7 < 26/7

Descent 2.1 fn

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

Equations

x+10=6

-x-58=20

68-x=-2

-23+x=0

-x÷11=-1

x÷3=-291

-10+x×2=10

52+94÷x=54

-(x-5)×2=-10

-(16-x)×9=90

Rounding

81.9≈82

30.97≈31

0.66≈0.7

77.461≈77.46

37.17+22.84≈60

29.431-25.435≈4

4.3×15.7≈68

2.26×30≈67.8

Language Exercises

Russian Vocabulary 2.4

д лемма

English Vocabulary 3.3

pi l

Lexicon 2.3

mem ry [remembrance]

Infinitive 1.2

rethink rethought [rethink]

Infinitive 3.1

dream [dream]

13+

Recommended for adolescents from the age of thirteen

Integer Examples

Conversant 0.4 in

-198-626=-824

Conversant 0.5 in

-228532+450000=221468

Conversant 1.4 in

-414+598=184

Conversant 2.4 in

-94-307+971=570

Conversant 2.5 in

-39565-759256-36212=-835033

Conversant 3.4 in

123-(622+185)=-684

Conversant 3.5 in

-648649-(980000-868459)=-760190

Conversant 4.4 in

-(524-516)-(597+61)=-666

Conversant 4.5 in

-(391946+433469)+(772757-500569)=-553227

Divisor 1.5 ip

9268914÷402=23057

Intellect 0.2 in

-706+918÷(28+26)=-689

503-300÷100=500

16-39×12÷18=-10

(-60-75)÷(15+12)=-5

-210÷(6÷(-3))=105

-20×(-15)=300

-2×5×5=-50

(20×(-50))÷(-25)=40

-2×(5×5)×5=-250

3352043÷391=8573

Decimal Examples

Partitive 0.4 dp

18+(462+194.741)=674.741

Partitive 1.4 dp

357.895-277.895=80

Partitive 2.4 dp

590-111.573-328.427=150

Partitive 3.4 dp

237.038+(265.417+175.545)=678

Split 0.3 dn

-40+43.29=3.29

Split 0.4 dn

-93.364+274.922=181.558

Split 1.3 dn

-44.39-35.61=-80

Split 1.4 dn

-10.495-147.571=-158.066

Split 2.3 dn

-22.45-6.22-11.74=-40.41

Split 2.4 dn

-93.725-75+140.922=-27.803

Split 3.3 dn

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

Split 3.4 dn

-160-(170.28+536.543)=-866.823

30÷25=1.2

0.252÷0.01=25.2

(3.2÷5)÷2.56=0.25

0.8×3.78=3.024

1.28×3.125=4

2.124÷2.4=0.885

5.76÷1.152=5

61.2÷34÷3=0.6

27.36÷43.776×52=32.5

0.24×(2.5×3.2)=1.92

1.2÷(100÷2)=0.024

6.88×5+1.04×15=50

90.68-1.6×12.5=70.68

86.284-78.125×0.256=66.284

Definition 2.2 dp

4.5×1.36+19.44÷12.96=7.62

Definition 2.3 dp

2.321-1.35÷25+7.042=9.309

Definition 3.2 dp

98.09-(38.79+1.53)÷1.5=71.21

Negatory 0.1 dn

(12.8+24)÷(-42.2-31.4)=-0.5

Negatory 0.2 dn

41.24-(7.99+34.25)×0.75=9.56

Negatory 1.2 dn

-10.5×2-21.74=-42.74

Negatory 1.3 dn

77-43.2÷3=62.6

Negatory 2.2 dn

-26.2+0.5×25.6÷0.25=25

Negatory 2.3 dn

63.385-0.6×0.015+34.894=98.27

Negatory 3.1 dn

1.6÷(-0.5-1.1)÷2=-0.5

Negatory 3.2 dn

1.32÷(29.16-33.16)×14=-4.62

Residual_ENG 1.2 dp

100÷25=4

Divisional_ENG 1.3 dp

0.234÷6=0.039

Fraction Examples

Numerator 0.3 fp

377/20+353/180=1873/90

Numerator 1.3 fp

4264/695+1556/695=1164/139

Numerator 2.3 fp

5211/271-5106/271+8025/271=30/1

Numerator 3.3 fp

32/85+(36/85+88831/940)=89583/940

Denominator 0.2 fn

25/82+(309/82-293/82)=1/2

Denominator 1.2 fn

-5/42-19/42=-4/7

Denominator 1.3 fn

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

Denominator 2.2 fn

5/6+191/66-12/77=25/7

Denominator 3.2 fn

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

3/4÷15/4×25/4=5/4

(21/2×9/7)÷135/4=2/5

12/19÷6/19=2/1

1/2÷1/23×97/46=97/4

1/2×260/3÷130/27=9/1

(35/4×1/10)×40/7=5/1

(13/12×219/13)÷73/24=6/1

Reduction 1.3 fp

3552/5400=148/225

Limited 0.1 fp

17/2-2/3×37/4=7/3

Limited 1.2 fp

11/13×195/44+235/46=815/92

(3/8+1/8)÷2/3=3/4

39/4-5/2÷10/3=9/1

-7/10÷14/5-1/2=-3/4

-7/17÷79/34-18/79=-32/79

Complete 2.1 fn

(53/10+3/2)÷17/10=4/1

Comparisons

Ceil 0.4 in

438900 > 300000

Ceil 1.4 in

271305 > -271305

Ceil 2.4 in

-277008-152992 < -246016+935177

Ceil 3.4 in

-668800÷2 > -788012÷2

Point 0.3 dp

55.728+14.272 > 12.571+14.799

Point 0.4 dp

200 > 117.366

Point 2.4 dp

925.983-860.483 < 48.669+24.331

Point 3.3 dp

34.986÷4.998 < 19.272÷1.606

Point 3.4 dp

280.824÷4 < 561.664÷8

Doted 0.3 dn

75.693-50.918 < -9.088+89.088

Doted 1.3 dn

-77.522 < -77.515

Doted 1.4 dn

108.111 < 886.755

Doted 2.3 dn

5.133+9.104 < -18.552+32.805

Doted 2.4 dn

78.618+44.684 < -3.756+583.756

Doted 3.3 dn

-12.75×(-7.84) > 84.424÷(-1.384)

Improper 0.3 fp

13313/275-36909/770 < 8499/112-16791/224

Improper 3.3 fp

1/4×176/47 < 471/17×2125/628

Descent 0.1 fn

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

Descent 0.2 fn

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

Descent 1.3 fn

213/254 < 9715/381

Descent 2.2 fn

-2/7-13/28 < 493/52-69/52

Descent 3.1 fn

-1/4÷(-1/2) > -1/4÷1/2

Descent 3.2 fn

-6/1÷(-42/5) > 1/2×(-1/2)

Equations

-(-x+764)×250=-1000

89-900÷x=-1

-756÷(-937+x)=36

x-y=9

Rounding

Rounding 0.3 dp

56.862-14.962≈41.9

Rounding 3.3 dp

92×0.5≈46

Language Exercises

Russian Vocabulary 1.5

наскво ь

Russian Vocabulary 3.4

талантл вый

English Vocabulary 1.4

pur hase

English Vocabulary 2.4

poten ial

Lexicon 1.4

a dience [hearing]

Infinitive 2.2

beseech [beseech]

14+

Recommended for adolescents from the age of fourteen

Integer Examples

Intellect 0.3 in

-158×54-2160÷80=-8559

Intellect 1.3 in

-7015-1656÷24=-7084

Intellect 2.3 in

-4100+608÷38+93984=89900

7258-35÷(30+5)=7257

-15×(-60)÷50=18

-50×(-93)=4650

5×20÷(-10)=-10

-500÷(-25×2)=10

-8550÷(-15)×(-40÷10)=-2280

Decimal Examples

Residual 1.3 dp

55÷5=11

Denary 0.4 dp

5.28÷(0.48×6.25)=1.76

0.5×1.44=0.72

0.506÷5.06=0.1

0.5×0.034=0.017

38.8×24.25÷0.97=970

(6.25×48)÷19.2=15.625

Definition 0.3 dp

40.128-0.864÷1.6=39.588

Definition 0.4 dp

968.241+2.73÷0.624÷7=968.866

Definition 1.4 dp

262.198-1.25×80=162.198

Definition 2.4 dp

631.884+2.4×6.84-223.77=424.53

Definition 3.3 dp

(0.5+0.75)×(84.706-44.706)=50

Definition 3.4 dp

824.723+3.2÷(0.5+0.3)=828.723

Negatory 0.3 dn

-43.24÷11.5-23.264=-27.024

Negatory 0.4 dn

-1.14÷(-0.586-5.414)÷0.01=19

Negatory 1.4 dn

-713.784+656.64÷0.512=568.716

Negatory 2.4 dn

-27.36÷684-2.7÷37.5=-0.112

Negatory 3.3 dn

-94.5÷(30.956+8.419)×20.475=-49.14

Negatory 3.4 dn

(11.044+1.756)×(-51.194-11.306)=-800

Residual_ENG 1.3 dp

58÷100=0.58

Fraction Examples

Denominator 0.3 fn

-8046/205+2427/410-383/82=-38/1

Denominator 2.3 fn

2127/209+16455/209-12895/451=2473/41

Denominator 3.3 fn

55/19-(995/133+5375/133)=-45/1

Fragment 0.3 fp

57/2×20/19=30/1

Fragment 3.3 fp

97/18×(576/13÷64/13)=97/2

Limited 0.2 fp

48/11÷8/33+582/23=996/23

Limited 1.3 fp

1108/13-10/13÷5/86=72/1

Limited 2.2 fp

(1231/34-1069/34)÷27/4=12/17

Complete 0.2 fn

175/87×(-79/10-19/2)=-35/1

Complete 1.3 fn

1/2÷5/704+9381/635=10817/127

Complete 2.2 fn

-5/2×(73/5-71/5)=-1/1

Comparisons

Doted 0.4 dn

-60.698÷(-4.4) > -856.26÷60.3

Doted 3.4 dn

-38.4×11.925 < -1.6×20

Descent 0.3 fn

9/13 < 16142/247

Descent 2.3 fn

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

Descent 3.3 fn

-50/7×(-63/40) > -135/2÷405/314

Equations

-x²-3x-2=0

2x²=0

4x²-8x=0

x²+2x-24=0

x+y=19

y+x=76

18x÷3y=27

6x+y=70

-102y÷6x=34

y+x=6

-11x÷y=-11

-6y-4x=100

Language Exercises

Russian Vocabulary 2.5

впр сядку

English Vocabulary 1.5

commis ion

English Vocabulary 2.5

encoura ement

English Vocabulary 3.4

sp ritual

Lexicon 1.5

commun cation [giving]

Lexicon 2.4

per uade [assure]

Infinitive 1.3

withdraw withdrawn [withdraw]

Infinitive 3.2

sit [sit]

15+

Recommended for adolescents from the age of fifteen

Integer Examples

Logics 0.4 in

(14400÷(-10))÷12=-120

-319×610=-194590

-230400÷96÷(-75)=32

(-616000÷70)÷440=-20

-830760÷(-43)÷(78150÷(-7815))=-1932

Fraction Examples

Limited 0.3 fp

62/221×65/496+13/24=59/102

Limited 2.3 fp

(9/11-19/77)÷1/28=16/1

Complete 0.3 fn

15/28×4/5+60127/637=60400/637

Complete 2.3 fn

(191/209-37/209)×361/14=19/1

Equations

68x²+2720x=0

88x²=0

20x²-1200x=0

19x²-19x-38=0

x+y=100

x+y=609

y×14x=43904

30y-20x=750

-90y+36x=-7560

y+x=51

828x÷12y=-46

3x-y=-294

Language Exercises

Russian Vocabulary 3.5

надв е

English Vocabulary 3.5

conv nient

Lexicon 2.5

pron nciation [utterance]

Infinitive 2.3

beset [beset]

16+

Recommended for adolescents from the age of fifteen

Equations

-29x²+580x+609=0

187x²=7480000

-912x²+740544x=0

4x²-440x-16800=0

40y-40x=24440

840x÷294y=4

64x+419y=93036

108y-930x=183060

x-y=-340

6x×3y=-8550000

821y+122x=-644484

Language Exercises

Infinitive 3.3

sling [sling]

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