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+3=6

Beginner 2.1 ip

7-2=5

Beginner 3.1 ip

3+4=7

Step-by-step Tasks

3+2=5

4+1=5

1+4=5

1+0=1

9+1=10

3-1=2

2-1=1

3-2=1

9-1=8

7-2=5

6-3=3

Recommended for children from six years

Integer Examples

6+11=17

10-4=6

20-8=12

8-4-2=2

Step-by-step Tasks

8+2=10

9+3=12

5+3=8

4+4=8

3-3=0

9+5=14

5+3=8

6+1=7

3+5=8

4+7=11

8+7=15

4+2=6

5+8=13

9+8=17

2-1=1

10+4=14

7+10=17

5-4=1

10-5=5

9-2=7

13-3=10

14-4=10

15-6=9

12-7=5

1-1=0

14-8=6

11-8=3

12-9=3

15-10=5

10-10=0

Recommended for children from seven years

Integer Examples

3+(6+1)=10

69+22=91

46-36=10

100-57=43

18-1-5=12

1+(9-7)=3

Step-by-step Tasks

10+10=20

13+2=15

6+14=20

22+2=24

3+10=13

4+7=11

5+5=10

15-12=3

15+11=26

6+12=18

5+27=32

8-6=2

19-11=8

3-2=1

10-3=7

14-4=10

6-5=1

18-6=12

11-7=4

20-20=0

3×1=3

2×4=8

1×3=3

9÷1=9

Comparisons

Natural 1.1 ip

2 < 7

Natural 2.1 ip

4+0 < 5-0

Language Exercises

Russian Vocabulary 1.1

од ванчик

Recommended for children from eight years

Integer Examples

16+(2+2)=20

126+347=473

803-143=660

665-589=76

23-10+4=17

20-(7+10)=3

11×4=44

60÷12=5

8×4=32

72+17=89

79-31=48

49+11=60

Step-by-step Tasks

29+1=30

16-10=6

8+2=10

19+12=31

30+60=90

16+24=40

19-19+0=0

20-8=12

30-20=10

12-9=3

3-0=3

20-0=20

50-10=40

3×1=3

2×1=2

4×5=20

9×3=27

5×8=40

5×7=35

10×5=50

10×6=60

9×6=54

3×7=21

1×6=6

5×2=10

1×8=8

1×5=5

9×4=36

9×9=81

10×5=50

10×4=40

14÷2=7

12÷2=6

18÷3=6

8÷2=4

24÷4=6

9÷1=9

15÷5=3

27÷3=9

10÷2=5

48÷6=8

48÷6=8

14÷7=2

54÷6=9

15÷3=5

48÷8=6

35÷7=5

54÷9=6

72÷8=9

80÷2=40

30÷10=3

Comparisons

4×1 < 2×5

86 > 70

61-11 > 23+12

10÷10 < 7×1

Equations

Linear 1.1 ip

2+x=4

Linear 2.1 ip

x÷5=1

Language Exercises

Russian Vocabulary 1.2

г тара

Russian Vocabulary 2.1

ф враль

Russian Vocabulary 3.1

запа

English Vocabulary 1.1

tr e

English Vocabulary 2.1

f re

Lexicon 1.1

h use [home]

Lexicon 2.1

pl yer [gambler]

Recommended for children from nine years

Integer Examples

27+1=28

897+24-626=295

49+(31+12)=92

12÷(9÷3)×7=28

7×4=28

696÷2=348

14×38=532

3×3×7=63

6×(2×2)=24

5×4÷(10÷2)=4

11÷5=2(1)

2422+7578=10000

3693-2393=1300

7500+391=7891

31×7=217

92÷4=23

47+9÷3=50

58+45÷3-43=30

45÷9=5

41÷6=6(5)

Step-by-step Tasks

12×2=24

4×11=44

3×11=33

20×3=60

16×4=64

15×5=75

12×1=12

20×5=100

5×16=80

6×16=96

7×17=119

1×15=15

8×11=88

16×5=80

11×9=99

15×7=105

15×10=150

30×6=180

7×8=56

16÷2=8

0÷11=0

51÷3=17

30÷2=15

32÷4=8

70÷5=14

24÷2=12

48÷4=12

100÷10=10

42÷6=7

21÷7=3

140÷7=20

32÷8=4

25÷5=5

9÷9=1

32÷8=4

320÷10=32

108÷9=12

12÷4=3

Comparisons

100-0 > 83-16

80 < 864

744-348 > 809-426

100÷10 < 30×3

Equations

Linear 1.2 ip

23+x=63

Linear 2.2 ip

x÷2=30

Linear 3.1 ip

x÷5-2=0

Language Exercises

Russian Vocabulary 1.3

фабр ка

Russian Vocabulary 2.2

мяк ть

Russian Vocabulary 3.2

аквар ум

English Vocabulary 3.1

doo

10+

Recommended for children from ten years

Integer Examples

764-(85+224)=455

141211+55934=197145

688969-34501=654468

186902+813098=1000000

649-(425+169)=55

952÷34=28

77×52=4004

1026÷6=171

52×81=4212

40×5÷8=25

40×(2×2)=160

450÷5×(16÷4)=360

111÷11=10(1)

157000+281637=438637

157910-66725=91185

497867-443120=54747

6615×2=13230

1900×26=49400

938÷2=469

57+30÷(24-22)=72

370-40÷2=350

15×12+10×9=270

(29-26)×(10+6)=48

637÷7=91

172÷16=10(12)

Comparisons

Natural 0.3 ip

40×4 < 936÷3

Natural 1.4 ip

920151 > 560411

Natural 2.4 ip

149195+302809 < 638509+30086

Natural 3.3 ip

840÷20 < 14×34

Equations

4+x=9

793+x=893

330÷x=33

78÷x-1=1

9÷(x+1)=3

Rounding

Round 1.1 ip

713≈71

Round 1.2 ip

6039≈60

Round 2.1 ip

927-21≈91

Language Exercises

Russian Vocabulary 2.3

оз рничать

English Vocabulary 1.2

range

English Vocabulary 2.2

ins de

Lexicon 1.2

th m [pronoun]

Lexicon 2.2

e ch [both]

Infinitive 1.1

rid rid [rid]

11+

Recommended for children from the age of eleven

Integer Examples

Beginner 0.5 ip

957514-57514=900000

Beginner 4.5 ip

61973+838027-83493=816507

Beginner 5.5 ip

479830-(650000-640891)=470721

Conversant 1.1 in

0-8=-8

Conversant 1.5 in

-522467-204929=-727396

0-2+3=1

14×42=588

9856÷8÷2=616

1456÷(14÷7)=728

60÷(30÷10)÷2=10

436÷67=6(34)

2250×908=2043000

7505÷79=95

180×3+161=701

(1791-1341)÷(20+10)=15

Numeracy 1.3 ip

544-2100÷14=394

Numeracy 2.3 ip

584×95-1280÷128=55470

Numeracy 3.2 ip

84+(576-76)÷4=209

Numeracy 3.3 ip

(3334-3064)÷(1300-1270)=9

Divisor_ENG 1.3 ip

3565÷31=115

Remainder_ENG 1.3 ip

300÷78=3(66)

Decimal Examples

3.1+(6.3+0.2)=9.6

72.6+9=81.6

0.1+7=7.1

6+77.9=83.9

3.3+7.4-2.2=8.5

30+100-65=65

4.2-(8.9-6)=1.3

15.9+(5.7+32)=53.6

30.6÷8.5=3.6

8.4×4.5=37.8

7.6÷1.9=4

1.4÷3.5=0.4

Divisional_ENG 1.1 dp

46÷0.8=57.5

Fraction Examples

Numerator 1.1 fp

1/10+2/5=1/2

Comparisons

Natural 0.4 ip

18469+181531 > 15000+34092

499904÷214 > 3×64

-6÷(-3) > -8÷4

3 > -8

-4+10 > 2-8

5÷(-5) > 2×(-3)

48.7 > 44.5

34+26.2 = 8.1+52.1

1/8 < 1/4

81/23 > 38/69

7/10-1/10 > 5/6-1/3

Equations

x÷6=8

x-222=328

x÷463-1=0

(19+x)×4=76

50×(8+x)=900

x+5=3

-x×2=2

Rounding

44.3≈44

96.1-70.5≈26

510-333≈18

9364÷4≈23

263×2351≈618

240012≈240

1581+2585≈42

583433-140905≈443

29×29≈84

5770÷10≈6

3238×200≈648

Language Exercises

Russian Vocabulary 1.4

эпигра

Russian Vocabulary 3.3

пр дирчиво

English Vocabulary 1.3

c re

English Vocabulary 2.3

ver ion

English Vocabulary 3.2

oung

Lexicon 1.3

f intly [weakly]

Infinitive 2.1

outsit [outsit]

12+

Recommended for children from the age of twelve

Integer Examples

-7+7=0

-4-4=-8

-60+10=-50

8-16=-8

-74+42=-32

-11+19-19=-11

-18+29-37=-26

0+(9-10)=-1

-11-(-7-14)=10

-80-(-50-50)=20

-(3-2)+(10-7)=2

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

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

470600÷50=9412

738×345=254610

636004÷2=318002

716082÷138=5189

1000÷4÷25=10

340032÷(28×3)=4048

2×(4×5)×50=2000

15213×5107=77692791

29750÷17=1750

90÷2-76=-31

23+3×19=80

7×10+72÷9=78

(100-10)÷(13-4)=10

2×25÷(10÷2)=10

-66÷(-6)=11

5×2÷10=1

(-80÷2)÷(-4)=10

-2×(48÷(-6))÷8=2

65961÷21=3141

Decimal Examples

Partitive 0.3 dp

38.43-34.77=3.66

Partitive 1.3 dp

16.63+65.61=82.24

Partitive 2.3 dp

49.24+21.71-63.09=7.86

Partitive 3.3 dp

81-(59.17-50.16)=71.99

-3.9-(0.8+4.8)=-9.5

42+40.5=82.5

7-4.2=2.8

-84-14.4=-98.4

0.6-4.8+5.1=0.9

-95.2+87.5-35.5=-43.2

Split 3.1 dn

-2.2+(-4.9-2.8)=-9.9

Split 3.2 dn

-7+(-14.5-70.1)=-91.6

95÷10=9.5

1.26÷0.18=7

(46.3÷92.6)×6.8=3.4

3.75×2.4=9

11.2÷70=0.16

4×0.01=0.04

13×1.5×1.2=23.4

8.8÷(72÷9)=1.1

74.1÷9.5-0.2=7.6

2×0.4+41.5=42.3

68.7-1.2÷2.4×96=20.7

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

65÷10=6.5

Divisional_ENG 1.2 dp

45.24÷3.77=12

Fraction Examples

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

1/3+(1/6+17/2)=9/1

13/33+379/99=38/9

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

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

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

63/8-(1/2+51/8)=1/1

5/8+1/4=7/8

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

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

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

3/5÷21/5=1/7

7/11×121/7=11/1

3/2×1/3÷9/8=4/9

56/8=7/1

176/4=44/1

2/3×6/7+3/7=1/1

Comparisons

77 < 82

978÷(-6) < -810÷6

-100 < 4

730 > 554

11+18 < 70-0

-172-301 < 70+250

66÷(-6) > 25×(-4)

-4×(-33) > -890÷89

1.8×5 = 45.9÷5.1

56.88-4.25 < 1.7+50.94

1.3 > 1.28

74.87 < 98.82

371.1 > 95.15

96.8-25.14 > 66.5-7.5

Point 2.3 dp

39.844-21.759 < 80.249-59.756

87÷5.8 > 0.5×20.8

29.9÷10 < 18.9÷1.26

-47.3 < 47.4

-97.85÷1.03 < 95.04÷(-3.52)

27 > -32.8

-41.12 < 48.26

-11.6-1.9 < 8+5.5

-79.74+53 < 79.43+3.57

Doted 3.1 dn

-1.6×(-12.5) > -6×4.4

Doted 3.2 dn

71.5÷(-1.3) < 58.25÷2.33

1/2×2/7 < 1/2÷5/8

227/79 > 1/2

25052/267 > 1679/18

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

Improper 2.3 fp

177/2-4391/974 > 277/5-107/5

Improper 3.1 fp

1/5÷1/3 = 9/10×2/3

Improper 3.2 fp

7/3×151/84 < 1/2÷1/17

Descent 1.1 fn

3/10 > -7/8

Descent 1.2 fn

43/7 > -22/3

Descent 2.1 fn

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

Equations

-1+x÷7=-1

44÷(-x)=2

-14-x=14

-x+943=0

-2×x=-84

x×31=806

-x÷10-9=-8

-4+x÷20=0

3÷(-x+9)=-3

-2×(98-x)=-72

Rounding

4.5≈5

61.68×1.4≈86.4

20.54≈20.5

61.596≈61.6

66.14+6.07≈72.2

3.972+2.712≈6.68

37.7÷42.9≈1

1.61×48.93≈78.8

Language Exercises

Russian Vocabulary 2.4

к ндидат

English Vocabulary 3.3

pi l

Lexicon 2.3

stri ed [streaked]

Infinitive 1.2

leap leapt [leap]

Infinitive 3.1

daydream [daydream]

13+

Recommended for adolescents from the age of thirteen

Integer Examples

Conversant 0.4 in

-434-728+612=-550

Conversant 0.5 in

-838313+779082=-59231

Conversant 1.4 in

78-280=-202

Conversant 2.4 in

-94-307+971=570

Conversant 2.5 in

-39565-759256-36212=-835033

Conversant 3.4 in

-821-(-206+65)=-680

Conversant 3.5 in

583000-(856644-390000)=116356

Conversant 4.4 in

(333-538)+(211+44)=50

Conversant 4.5 in

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

1562499÷139=11241

-295-56×44÷11=-519

-262×5+360=-950

63+141×10-594=879

600-27÷(10+17)=599

-50÷10×(-20)=100

-14÷7=-2

14×2×(-10)=-280

(-168÷(-6))÷(-4)=-7

25×4×(-30÷10)=-300

2489837÷119=20923

Decimal Examples

Partitive 0.4 dp

524.517-(21.608+486.975)=15.934

Partitive 1.4 dp

588.902-74.629=514.273

Partitive 2.4 dp

487.916-95.12-202.796=190

Partitive 3.4 dp

537.051-(295.368-167.605)=409.288

Split 0.3 dn

63.09+23.56=86.65

Split 0.4 dn

150.322+(307.251-564.84)=-107.267

Split 1.3 dn

29.75+40.32=70.07

Split 1.4 dn

423.979+231.642=655.621

Split 2.3 dn

-35.09+20.59-79.31=-93.81

Split 2.4 dn

448.696-466.3+31.2=13.596

Split 3.3 dn

-65.81-(-51+81.44)=-96.25

Split 3.4 dn

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

74÷8=9.25

0.924÷0.5=1.848

9.6×0.5×12.5=60

12.1÷100=0.121

8.625×1.664=14.352

2.124÷2.4=0.885

10.35×5.28=54.648

18.4÷7.36÷1.25=2

3.84×0.75×33.6=96.768

Denary 5.2 dp

(10.25÷51.25)×0.2=0.04

Denary 5.3 dp

(28.586÷14.293)×0.007=0.014

Definition 0.2 dp

36.87+0.2÷(80.88-80.8)=39.37

Definition 1.2 dp

2×0.04+9.95=10.03

Definition 1.3 dp

39.788-4.68÷2.08=37.538

Definition 2.2 dp

62.83-0.9÷3×34=52.63

Definition 2.3 dp

28.622+9×2.127÷76.572=28.872

Definition 3.2 dp

(90-88.57)×(19.5+4.5)=34.32

Negatory 0.1 dn

83.8+27.2÷4=90.6

Negatory 0.2 dn

-67.71+77.76÷(1.07+1.33)=-35.31

Negatory 1.2 dn

24+18.75×0.32=30

Negatory 1.3 dn

29.484÷2.52+59.372=71.072

Negatory 2.2 dn

-26.2+0.5×25.6÷0.25=25

Negatory 2.3 dn

-15×1.76+2.16÷0.025=60

Negatory 3.1 dn

7-(0.6+0.6)×2.5=4

Negatory 3.2 dn

-30+91.2÷(43.43-31.27)=-22.5

Residual_ENG 1.2 dp

21÷10=2.1

Divisional_ENG 1.3 dp

63.36÷9.216=6.875

Fraction Examples

Numerator 0.3 fp

771/8-6803/72+307/171=70/19

Numerator 1.3 fp

44258/575-43918/575=68/115

Numerator 2.3 fp

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

Numerator 3.3 fp

14629/194-(9/97+79/97)=149/2

Denominator 0.2 fn

-189/29-(461/58-507/58)=-166/29

Denominator 1.2 fn

-2/43-1/43=-3/43

Denominator 1.3 fn

41/390+17/78=21/65

Denominator 2.2 fn

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

Denominator 3.2 fn

-98/25-(2/5-63/10)=99/50

1/2÷1/5÷9/2=5/9

6/7÷4/35×1/10=3/4

17/7÷17/28=4/1

1/2÷3/32×117/16=39/1

2/3×297/4÷2343/38=57/71

Fragment 3.1 fp

(56/9×3/8)×1/7=1/3

Fragment 3.2 fp

(1/2×110/3)×12/11=20/1

1050/30=35/1

14/5÷(14/3+7/3)=2/5

1/26+3/13×1/2=2/13

(13/4+23/4)×2/3=6/1

2/3-1/2×8/3=-2/3

15/2÷60/7+61/8=17/2

-571/12-103/3÷1442/37=-1357/28

Complete 2.1 fn

(22/3-17/3)×12/5=4/1

Comparisons

Ceil 0.4 in

990537-17775 > 2600+3199

Ceil 1.4 in

979486 < 982390

Ceil 2.4 in

-388433+544440 > -91637-66686

Ceil 3.4 in

-564608÷(-22) > -2×(-3872)

Point 0.3 dp

70.062-9.497 > 27.029+9.946

Point 0.4 dp

200 > 117.366

Point 2.4 dp

990.111-5.414 > 991.834-127.012

Point 3.3 dp

19.788÷4 < 20.74÷4.148

Point 3.4 dp

363.24÷3.027 < 2.41×49.8

Doted 0.3 dn

-30+57 > -45.425-10.68

Doted 1.3 dn

10.084 < 12.192

Doted 1.4 dn

2.314 > -834.886

Doted 2.3 dn

16.235+62.865 > -25.305-17.383

Doted 2.4 dn

393.182-363.682 < 374.829-345.326

Doted 3.3 dn

-65.04÷(-1.355) > 15×(-3.201)

Improper 0.3 fp

13194/163+3424/489 > 11692/133-102/133

Improper 3.3 fp

77/96÷1771/636 < 47/66×4482/47

Descent 0.1 fn

-1/6÷(-3/4) > 1/3÷(-2/5)

Descent 0.2 fn

-103/16 < 13/2

Descent 1.3 fn

351/838 > -1735/19

Descent 2.2 fn

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

Descent 3.1 fn

1/3×(-2/3) < 3/5×5/9

Descent 3.2 fn

-1/2×(-6/1) > 5/1×8/15

Equations

-5-x×30=-815

1000+43×x=1000

-300÷(176-x)=-60

y+x=1

Rounding

Rounding 0.3 dp

16.293+14.006≈30.3

Rounding 3.3 dp

90÷84.892≈1.06

Language Exercises

Russian Vocabulary 1.5

нар спев

Russian Vocabulary 3.4

иллюм нация

English Vocabulary 1.4

ob ective

English Vocabulary 2.4

cr me

Lexicon 1.4

d pressing [downtrodden]

Infinitive 2.2

overspill [overspill]

14+

Recommended for adolescents from the age of fourteen

Integer Examples

Intellect 0.3 in

-7268-368÷92+17272=10000

Intellect 1.3 in

-2772÷18-5199=-5353

Intellect 2.3 in

-2686-2000÷40+5508=2772

Intellect 3.3 in

-94798+87780÷(91+19)=-94000

-3520÷8=-440

-52×99=-5148

25×4÷2=50

-500÷(-25×2)=10

7424÷(4×4)÷16=29

Decimal Examples

55÷5=11

9÷3.75×78.02=187.248

4.5×0.012=0.054

9.072÷0.648=14

138.24÷34.56=4

8.96×25×0.05=11.2

(6.25×48)÷19.2=15.625

Definition 0.3 dp

(69.775-68.345)×(5.364+6.536)=17.017

Definition 0.4 dp

415.368+90.288÷16+233.677=654.688

Definition 1.4 dp

46.08÷1.125-10.175=30.785

Definition 2.4 dp

368.51-2.3×0.02+189.536=558

Definition 3.3 dp

(62.824-61.816)÷(1.451-1.367)=12

Definition 3.4 dp

(566.687-566.607)÷(0.532+1.468)=0.04

Negatory 0.3 dn

-43.24÷11.5-23.264=-27.024

Negatory 0.4 dn

(-921.415-52.313)÷(1.146+0.618)=-552

Negatory 1.4 dn

503.634+912.384÷17.28=556.434

Negatory 2.4 dn

-521.82-22.4÷7.168÷25=-521.945

Negatory 3.3 dn

(10.6+5.4)÷(0.637+0.003)=25

Negatory 3.4 dn

89×(0.939+2.502)÷10.68=28.675

Residual_ENG 1.3 dp

35÷5=7

Fraction Examples

Denominator 0.3 fn

-2/11+(-9/253-3448/115)=-151/5

Denominator 2.3 fn

-9/10+1985/57-341/10=-10/57

Denominator 3.3 fn

-4/15+(3377/62-1/90)=15119/279

Fragment 0.3 fp

1133/34÷103/2×4216/61=2728/61

Fragment 3.3 fp

(43/50÷43/20)×91/9=182/45

Limited 0.2 fp

218/9÷(1/2+1/6)=109/3

Limited 1.3 fp

25/116-18/29÷696/35=155/841

Limited 2.2 fp

34/5÷(159/7-145/7)=17/5

Complete 0.2 fn

413/30+32/5×25/48=171/10

Complete 1.3 fn

212/981-19/48×30488/327=-23995/654

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

241/5-16131/340 > -766/9+56/1

Descent 2.3 fn

4577/219+5983/219 > 1333/33-412/33

Descent 3.3 fn

-95/192×156/95 < 1/14÷(-1/7)

Equations

x²-3x-18=0

10x²=90

-8x²+80x=0

-x²+6x+16=0

10y+10x=200

y+x=31

2x×2y=40

6y-2x=40

2x×y=160

y+x=-3

8x×2y=-320

-6x-7y=71

Language Exercises

Russian Vocabulary 2.5

наскво ь

English Vocabulary 1.5

extra rdinary

English Vocabulary 2.5

adv nce

English Vocabulary 3.4

themsel es

Lexicon 1.5

surpri ingly [amazingly]

Lexicon 2.4

per uade [assure]

Infinitive 1.3

withdraw withdrew [withdraw]

Infinitive 3.2

awake [awake]

15+

Recommended for adolescents from the age of fifteen

Integer Examples

(-63360÷36)÷(-44)=40

992×(-676)=-670592

20×160÷(-400)=-8

-640000÷(3200÷(-800))=160000

Logics 4.4 in

-100×(10×10)×94=-940000

Fraction Examples

Limited 0.3 fp

1/3÷19/39-77/304=131/304

Limited 2.3 fp

(81/133-4/7)×741/140=39/196

Complete 0.3 fn

15/28×4/5+60127/637=60400/637

Complete 2.3 fn

5/49÷(6/119+118/357)=15/56

Equations

28x²-1120x=0

16x²=6400

-61x²-1220x=0

-x²+29x+342=0

6x×5y=65610

y+x=1296

5x÷y=5

20y+30x=3460

2530x÷80y=115

-y-x=-10

66x÷5y=66

8y+12x=1640

Language Exercises

Russian Vocabulary 3.5

н верх

English Vocabulary 3.5

continuo sly

Lexicon 2.5

anniv rsary [annual]

Infinitive 2.3

sightread [sight-read]

16+

Recommended for adolescents from the age of fifteen

Equations

678x²=43392

231x²=1006236

-399x²+259350x=0

-x²+121x+1452=0

x+y=800

840x÷294y=4

20y+13x=22499

143x+733y=-648800

-x+y=592

96y÷16x=1689

-150x+760y=444400

Language Exercises

Infinitive 3.3

cut [cut]

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