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

1+2=3

Beginner 2.1 ip

4-1=3

Beginner 3.1 ip

7-1=6

Step-by-step Tasks

4+1=5

4+1=5

1+2=3

0+3=3

1+9=10

4-2=2

5-2=3

7-4=3

9-1=8

5-2=3

10-3=7

Recommended for children from six years

Integer Examples

6+11=17

14-8=6

20-8=12

10-7+2=5

Step-by-step Tasks

7+2=9

1+3=4

3+7=10

7+4=11

4+6=10

5+7=12

1+4=5

0+6=6

3+7=10

7+1=8

8+7=15

7+1=8

6+8=14

9+8=17

2-1=1

10+4=14

7+10=17

8-4=4

5-5=0

10-1=9

14-1=13

14-4=10

7-6=1

16-7=9

16-1=15

14-8=6

11-5=6

19-9=10

5-0=5

19-10=9

Recommended for children from seven years

Integer Examples

7-3=4

30+57=87

75-45=30

58+32=90

1+3+13=17

9-(10-3)=2

Step-by-step Tasks

10+3=13

1+9=10

6+14=20

12+14=26

23+11=34

12+4=16

0+20=20

14+16=30

15+1=16

6+11=17

7+12=19

17-6=11

19-11=8

18-12=6

19-13=6

14-4=10

19-5=14

17-6=11

11-7=4

20-20=0

9×1=9

2×4=8

1×1=1

4÷1=4

Comparisons

Natural 1.1 ip

1 = 1

Natural 2.1 ip

5-0 > 8-5

Language Exercises

Russian Vocabulary 1.1

г рох

Recommended for children from eight years

Integer Examples

2+16=18

24+536=560

854-154=700

256+16=272

100-10-54=36

19+(9-8)=20

38×2=76

92÷23=4

3×3=9

56+30=86

75-42=33

73-51=22

Step-by-step Tasks

29+1=30

29+6=35

8+13=21

4+9=13

10+30=40

39+11=50

19-19+0=0

9-8=1

30-20=10

19-9=10

14-11=3

29-9=20

60-30=30

3×0=0

10×2=20

4×2=8

4×7=28

5×0=0

3×3=9

10×5=50

2×6=12

9×6=54

3×7=21

1×6=6

4×10=40

1×8=8

8×7=56

4×9=36

9×9=81

10×5=50

10×8=80

10÷2=5

6÷2=3

21÷3=7

2÷1=2

24÷4=6

4÷2=2

5÷5=1

24÷3=8

20÷4=5

0÷6=0

48÷6=8

35÷7=5

32÷4=8

70÷7=10

72÷8=9

0÷3=0

45÷9=5

15÷5=3

80÷8=10

0÷10=0

Comparisons

4 > 2

46 = 46

10+3 < 20-3

3÷3 < 8÷4

Equations

Linear 1.1 ip

10-x=1

Linear 2.1 ip

3÷x=1

Language Exercises

Russian Vocabulary 1.2

авт р

Russian Vocabulary 2.1

учебн к

Russian Vocabulary 3.1

Апрел

English Vocabulary 1.1

tr e

English Vocabulary 2.1

f re

Lexicon 1.1

fl w [stream]

Lexicon 2.1

j mp [leap]

Recommended for children from nine years

Integer Examples

95-20-21=54

781-388-341=52

12+(12+58)=82

60÷(6÷2)=20

28×19=532

532÷4=133

38×24=912

20÷5×8=32

6×(2×2)=24

90÷3÷(3×2)=5

36÷7=5(1)

5899+1801=7700

4576-1776=2800

6041-3545=2496

65×7=455

30÷6=5

87-34÷2=70

16+22÷11×4=24

18÷6=3

29÷3=9(2)

Step-by-step Tasks

15×2=30

2×11=22

3×11=33

2×15=30

12×4=48

12×5=60

2×12=24

23×4=92

10×4=40

19×6=114

7×17=119

5×6=30

17×8=136

39×2=78

14×9=126

5×21=105

15×10=150

50×4=200

19×8=152

8÷2=4

55÷11=5

42÷3=14

60÷3=20

60÷4=15

75÷5=15

24÷2=12

21÷3=7

20÷10=2

60÷6=10

126÷7=18

91÷7=13

128÷8=16

125÷5=25

9÷9=1

98÷7=14

490÷10=49

72÷8=9

77÷11=7

Comparisons

11×4 > 4×2

852 > 850

744-348 > 809-426

60÷5 < 100÷2

Equations

Linear 1.2 ip

75-x=75

Linear 2.2 ip

40÷x=4

Linear 3.1 ip

x×2+2=6

Language Exercises

Russian Vocabulary 1.3

б гроветь

Russian Vocabulary 2.2

изв ни

Russian Vocabulary 3.2

Амер ка

English Vocabulary 3.1

m od

10+

Recommended for children from ten years

Integer Examples

764-108=656

56900+28668=85568

668531-18531=650000

379990+206282=586272

594-(392-31)=233

952÷34=28

9×32=288

8800÷88=100

8408÷8=1051

90÷2×9=405

(4×25)÷20=5

10÷(5×2)×20=20

60÷5=12

281269+628731=910000

503251-320000=183251

314000+235759=549759

168×7=1176

5135×80=410800

928÷2=464

57+30÷(24-22)=72

599-27÷3=590

260÷2-10×4=90

(8+10)×(69-65)=72

710÷2=355

182÷17=10(12)

Comparisons

Natural 0.3 ip

930 > 919

Natural 1.4 ip

400000 > 399995

Natural 2.4 ip

793041-942 < 988140-34140

Natural 3.3 ip

2×5 < 8×9

Equations

3×(10-x)=6

x+103=220

x×50=450

47+x×4=47

(x+1)×3=6

Rounding

Round 1.1 ip

232≈23

Round 1.2 ip

2391≈24

Round 2.1 ip

762+223≈99

Language Exercises

Russian Vocabulary 2.3

с рень

English Vocabulary 1.2

sta le

English Vocabulary 2.2

b nd

Lexicon 1.2

th m [pronoun]

Lexicon 2.2

l ss [privation]

Infinitive 1.1

undersell undersold [undersell]

11+

Recommended for children from the age of eleven

Integer Examples

Beginner 0.5 ip

452220-(652958-560738)=360000

Beginner 4.5 ip

860109-833681+73544=99972

Beginner 5.5 ip

517108+(102556+80200)=699864

-4+4=0

880000-442636=437364

4-9-5=-10

30×86=2580

8×200÷10=160

(1458÷27)÷2=27

6912÷3÷(8×8)=36

916÷33=27(25)

8648×270=2334960

4080÷12=340

760-33×9+307=770

1100×63-312÷78=69296

7000÷350+7117=7137

3659-34×20+1204=4183

319-171÷(550-379)=318

Numeracy 3.3 ip

676-69÷(3212-3143)=675

Divisor_ENG 1.3 ip

5200÷16=325

Remainder_ENG 1.3 ip

472÷93=5(7)

Decimal Examples

0+(4.7+0.8)=5.5

30.6+39.3+24=93.9

9.6-2.5=7.1

79+7.9=86.9

4.8+7-2.8=9

83.7-19.8-36.9=27

4.6-(1.4+0.6)=2.6

30.6+(55.1-16.5)=69.2

3.7÷0.5=7.4

3.5×2.2=7.7

36÷0.6=60

1.8×5=9

Divisional_ENG 1.1 dp

45÷3.6=12.5

Fraction Examples

Numerator 1.1 fp

7/9+1/9=8/9

Comparisons

416595 < 610000

13×16 < 35732÷2

-3 < 7

2 < 10

-9+1 < -1-5

5÷(-5) > 2×(-3)

48.7 > 44.5

85.7-74.3 < 11+2.2

8/9 < 1/1

361/37 = 361/37

5/6-1/3 < 1/2+1/6

Equations

57÷x=19

x÷5=90

670÷x-1=66

13×(84-x)=52

120×(x-864)=720

3-x=-3

x×7=-7

Rounding

68.5≈69

34.3-15.7≈19

671÷11≈6

992≈10

147857≈148

173856≈174

30+73≈1

999997-486≈1000

516÷2≈26

9646÷2≈48

737856÷122≈6

Language Exercises

Russian Vocabulary 1.4

вер вание

Russian Vocabulary 3.3

пр дирчиво

English Vocabulary 1.3

r bbish

English Vocabulary 2.3

st ff

English Vocabulary 3.2

d rty

Lexicon 1.3

lly [join]

Infinitive 2.1

mislay [mislay]

12+

Recommended for children from the age of twelve

Integer Examples

1-(-1-3)=5

10+(-20+1)=-9

-73-(90-81)=-82

1+9=10

-25+99=74

2+11-14=-1

-36+82+18=64

-10+(10+10)=10

-5-(1+14)=-20

33+(-37+1)=-3

-(10+10)+(4+9)=-7

-(16+2)-(4-2)=-20

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

300×1800=540000

247×239=59033

340000÷200=1700

17440÷10=1744

144×625÷9=10000

70000÷(26250÷75)=200

720÷(3690÷41)×25=200

15213×5107=77692791

37200÷10=3720

-70-20÷(2+2)=-75

25÷5+6=11

63-60÷3+54=97

65+21÷(26-5)=66

-6×(-3)×5=90

-66÷(-6)=11

40÷(-2)÷(-10)=2

4×(-6×4)=-96

24×(-4)÷(-2×(-2))=-24

Divisor_ENG 1.4 ip

12000÷60=200

Decimal Examples

38.6+(13.6+13.8)=66

72+22.88=94.88

67.12+70.42-50=87.54

81.49+(73-57.47)=97.02

2-9.3=-7.3

42+40.5=82.5

2.2+6.8=9

-1.3-54.2=-55.5

-1.9+0.6+6.3=5

-20.1-31.7-48.2=-100

0.8-(5.7+5)=-9.9

3.7-(-89.9-5)=98.6

52÷4=13

0.18÷2=0.09

1.2÷2=0.6

1.75×0.8=1.4

1.54÷0.56=2.75

42.24÷64=0.66

9×2.8÷7.2=3.5

(6.9÷69)÷0.5=0.2

83.1-0.5×20=73.1

1÷0.5+59.3=61.3

10.4-0.8×5+75.7=82.1

(71.1-69.6)×(58.4-24.8)=50.4

Negatory 1.1 dn

7.5-3.2×5=-8.5

Negatory 2.1 dn

0.5×12-1.7÷3.4=5.5

Residual_ENG 1.1 dp

37÷2=18.5

Divisional_ENG 1.2 dp

45.6÷3=15.2

Fraction Examples

1/10+1/5+7/10=1/1

203/31-109/62=297/62

5/7+169/28=27/4

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

99/19-23/19-17/19=59/19

Numerator 3.1 fp

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

Numerator 3.2 fp

1/2+(11/2+27/23)=165/23

1/2-7/10=-1/5

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

3/10-3/5+3/10=0/1

3/5-(-2/5+7/8)=1/8

3/2×10/7=15/7

1/2×762/29=381/29

14/3÷7/6×3/4=3/1

39/6=13/2

1200/50=24/1

5/6÷15/2+1/3=4/9

Comparisons

-45×2 < -44÷2

-22×(-3) = 11×6

30 < 100

-985 < -854

-14+74 > -30-60

-87-519 < -442-116

66÷(-6) > 25×(-4)

832÷2 > 660÷6

1.8×5 = 45.9÷5.1

7.25 = 7.25

23 > 21.12

42.354 < 42.371

698.297 < 918.659

99.53-2.7 < 99.04-2.19

Point 2.3 dp

10.277+8.723 < 45-7.757

9.8÷0.7 > 45÷50

22.4÷3.2 < 62.5×1.28

15.2+3.5 > -18-10.2

-66.38+4.06 < 48.74-8.78

Doted 1.1 dn

97 < 97.3

Doted 1.2 dn

87.32 > 87.31

Doted 2.1 dn

-7.7+34.7 < -15.5+42.7

Doted 2.2 dn

93.12-5.13 > -0.52-20.72

Doted 3.1 dn

-67.1÷(-1.1) > 36×(-1.7)

Doted 3.2 dn

-31.8÷1.06 = -36.3÷1.21

Improper 0.1 fp

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

Improper 0.2 fp

7/10×60/7 > 2/5×45/16

Improper 1.3 fp

14/1 < 85/1

Improper 2.2 fp

10/3-47/42 > 309/38-241/38

Improper 2.3 fp

1505/18-2021/414 < 1678/17-1143/391

Improper 3.1 fp

1/3÷3/7 > 1/3÷5/9

Improper 3.2 fp

34/13÷323/39 < 175/76×52/25

Descent 1.1 fn

5/7 > 2/3

Descent 1.2 fn

-373/73 < 5/1

Descent 2.1 fn

-1/2-1/2 < 1/2+1/2

Equations

-(-3+x)×3=6

3-80÷x=7

x+74=-11

x-9=58

100÷(-x)=1

x×80=-800

1-x÷5=0

-4+x÷20=0

-(x-5)×2=-10

20×(78+x)=0

Rounding

81.9≈82

65.17≈65.2

86.75≈86.8

82.203≈82.2

54.99-15.71≈39.3

3.972+2.712≈6.68

68.8÷3≈23

70÷2≈35

Language Exercises

Russian Vocabulary 2.4

орат р

English Vocabulary 3.3

se ing

Lexicon 2.3

f shing [piscatorial]

Infinitive 1.2

rethink rethought [rethink]

Infinitive 3.1

saw [saw]

13+

Recommended for adolescents from the age of thirteen

Integer Examples

Conversant 0.4 in

-648+838=190

Conversant 0.5 in

-515475+(967227-305954)=145798

Conversant 1.4 in

662-617=45

Conversant 2.4 in

-170+1000+130=960

Conversant 2.5 in

-25408-300629-472474=-798511

Conversant 3.4 in

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

Conversant 3.5 in

80712-(610000+352355)=-881643

Conversant 4.4 in

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

Conversant 4.5 in

-(13176+36770)-(381752+462858)=-894556

19600÷196=100

52÷2-236=-210

-262×5+360=-950

-86-6×2×2=-110

837+(-751-209)÷60=821

-37×(-21÷(-3))÷37=-7

22×22=484

500÷10÷(-5)=-10

-4×(5×5)=-100

5×(-2)×(5×7)=-350

1579107÷183=8629

Decimal Examples

Partitive 0.4 dp

455.8-339.8=116

Partitive 1.4 dp

357.895-277.895=80

Partitive 2.4 dp

9.226+380-334.3=54.926

Partitive 3.4 dp

225.89-(73-37.89)=190.78

Split 0.3 dn

27-88=-61

Split 0.4 dn

232-483.296-164.817=-416.113

Split 1.3 dn

-98.05+2.26=-95.79

Split 1.4 dn

344.568-375.72=-31.152

Split 2.3 dn

-95.7+85.46+45.64=35.4

Split 2.4 dn

15.832-205.642+55.221=-134.589

Split 3.3 dn

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

Split 3.4 dn

-160-(170.28+536.543)=-866.823

50÷20=2.5

22.08÷0.3=73.6

0.5×16=8

0.8×3.78=3.024

25.6×0.625=16

10.368÷0.648=16

1.38÷0.69=2

1.6÷5×1.5=0.48

90.896÷18.4÷2.47=2

0.24×(2.5×3.2)=1.92

1.2÷(100÷2)=0.024

36.87+0.2÷(80.88-80.8)=39.37

Definition 1.2 dp

20.09+21.6÷4.8=24.59

Definition 1.3 dp

98.091+18.63÷12.42=99.591

Definition 2.2 dp

31+21.6÷1.35-27.49=19.51

Definition 2.3 dp

38.8-1.3×32×0.5=18

Definition 3.2 dp

(19.41+33.03)÷(89.02-87.64)=38

Negatory 0.1 dn

83.8+27.2÷4=90.6

Negatory 0.2 dn

82.5÷(0.93+5.32)×4.5=59.4

Negatory 1.2 dn

20÷12.5+24.46=26.06

Negatory 1.3 dn

77-43.2÷3=62.6

Negatory 2.2 dn

8.07-12×6.25-3.69=-70.62

Negatory 2.3 dn

8.779+9.828÷27+77.51=86.653

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

100÷25=4

Divisional_ENG 1.3 dp

5.04÷0.375=13.44

Fraction Examples

Numerator 0.3 fp

7531/86+401/86=3966/43

Numerator 1.3 fp

851/13-214/13=49/1

Numerator 2.3 fp

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

Numerator 3.3 fp

1596/403+(33114/403-624/31)=66/1

Denominator 0.2 fn

8/23+77/92-39/46=31/92

Denominator 1.2 fn

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

Denominator 1.3 fn

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

Denominator 2.2 fn

-1/7+441/80-62/7=-279/80

Denominator 3.2 fn

-319/81+(9/17+25/17)=-157/81

1/2÷1/9÷5/4=18/5

56/13×117/14=36/1

175/4×28/25=49/1

2/3×69/5÷92/5=1/2

1/3÷1/6÷2/97=97/1

(35/4×1/10)×40/7=5/1

399/13×(29/2÷551/26)=21/1

Reduction 1.3 fp

2112/3504=44/73

Limited 0.1 fp

52/9÷4/7-1/9=10/1

Limited 1.2 fp

1/3×1251/26+231/26=324/13

(11/5-7/5)×25/4=5/1

2/3-1/2×8/3=-2/3

39/7+16/5÷7/4=37/5

5/7÷1/35-81/13=244/13

Complete 2.1 fn

-(27/5-17/5)×5/2=-5/1

Comparisons

Ceil 0.4 in

-886848÷(-2) > -481000÷13

Ceil 1.4 in

115004 > -118056

Ceil 2.4 in

766099-218093 > -843637+145103

Ceil 3.4 in

-10×(-3) < -693000÷(-9)

Point 0.3 dp

61.622-31.622 > 3.919+4.048

Point 0.4 dp

7.28×7.5 < 1.875×240

Point 2.4 dp

849.473-523.69 < 465.375+99.75

Point 3.3 dp

13.351÷1.027 > 74.712÷8

Point 3.4 dp

954.085÷10.043 > 26×2.53

-12.172 < 32.917

-96.706 < 88

-441.303 < 441.295

70.664-35.885 > 1.631+33.128

Doted 2.4 dn

78.618+44.684 < -3.756+583.756

Doted 3.3 dn

-44×(-1.1) > -2.5×34.56

Improper 0.3 fp

1/5×26895/659 < 199/7×182/597

Improper 3.3 fp

1/2×180/607 < 633/25÷211/695

Descent 0.1 fn

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

Descent 0.2 fn

-5/54+19/2 > 1/4+1/6

Descent 1.3 fn

53437/604 > -13406/151

Descent 2.2 fn

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

Descent 3.1 fn

-4/5×(-3/4) < -1/2÷(-3/4)

Descent 3.2 fn

5/1×(-73/50) < 4/11÷(-16/33)

Equations

-x+940=350

-480+780÷x=-450

-160×(-675+x)=-800

y+x=10

Rounding

Rounding 0.3 dp

4.37×0.168≈0.73

Rounding 3.3 dp

100÷1.25≈80

Language Exercises

Russian Vocabulary 1.5

акклим тизация

Russian Vocabulary 3.4

ккорд

English Vocabulary 1.4

pr ference

English Vocabulary 2.4

cr me

Lexicon 1.4

a dience [hearing]

Infinitive 2.2

sowed [sow]

14+

Recommended for adolescents from the age of fourteen

Integer Examples

Intellect 0.3 in

(10000-4900)÷(144+60)=25

Intellect 1.3 in

-7015-1656÷24=-7084

Intellect 2.3 in

5300-4692×45÷15=-8776

Intellect 3.3 in

(7954-7926)÷(6657-6650)=4

3168÷2÷(-4)=-396

79×20=1580

-15×500÷(-2)=3750

(-20×(-25))÷2=250

21×(-30×4)÷(-24)=105

Decimal Examples

Residual 1.3 dp

9÷30=0.3

Denary 0.4 dp

(269.824÷3.1)÷128=0.68

27.625×32=884

0.506÷5.06=0.1

6.144÷8=0.768

213.84÷388.8×411=226.05

Denary 5.4 dp

(4÷62.5)÷0.8=0.08

Definition 0.3 dp

4.2×(0.5+0.9)÷0.245=24

Definition 0.4 dp

322.56×1.9-457.938=154.926

Definition 1.4 dp

867.991-24÷15.625=866.455

Definition 2.4 dp

302.4÷168+13.328÷7=3.704

Definition 3.3 dp

29.08-(28.195-25.995)÷27.5=29

Definition 3.4 dp

194.4÷(0.5+0.75)÷0.432=360

Negatory 0.3 dn

-42.5×1.28-25.444=-79.844

Negatory 0.4 dn

960.4+320÷200=962

Negatory 1.4 dn

-380.53+405×0.026=-370

Negatory 2.4 dn

-521.82-22.4÷7.168÷25=-521.945

Negatory 3.3 dn

9.3×(0.614+9.386)÷4=23.25

Negatory 3.4 dn

89×(0.939+2.502)÷10.68=28.675

Residual_ENG 1.3 dp

28÷14=2

Fraction Examples

Denominator 0.3 fn

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

Denominator 2.3 fn

-108/7-22094/285+1782/19=88/105

Denominator 3.3 fn

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

Fragment 0.3 fp

35/3÷(2/3×1/2)=35/1

Fragment 3.3 fp

(1624/57÷1218/19)÷4/81=9/1

Limited 0.2 fp

(59/2-293/10)÷14/5=1/14

Limited 1.3 fp

805/566+4/11×385/8=5355/283

Limited 2.2 fp

255/11×(25/34-3/34)=15/1

Complete 0.2 fn

97/64×(2/11-354/11)=-97/2

Complete 1.3 fn

-3/4×142/99+421/990=-322/495

Complete 2.2 fn

-5/2×(73/5-71/5)=-1/1

Comparisons

Doted 0.4 dn

-156.978 > -748.831

Doted 3.4 dn

44.16×(-14.625) < 19×(-33.991)

Descent 0.3 fn

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

Descent 2.3 fn

-13475/698+45017/698 < -9680/349+25563/349

Descent 3.3 fn

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

Equations

7x²=63

7x²=112

4x²-8x=0

-x²-6x-9=0

y+x=15

x+y=105

x×20y=800

7y-4x=23

x-y=5

y+x=-3

8x×2y=-320

-8y-10x=180

Language Exercises

Russian Vocabulary 2.5

наскво ь

English Vocabulary 1.5

con entrate

English Vocabulary 2.5

adv nce

English Vocabulary 3.4

ill gal

Lexicon 1.5

inter retation [exposition]

Lexicon 2.4

wo nded [injured]

Infinitive 1.3

rehear reheard [rehear]

Infinitive 3.2

foresaw [foresee]

15+

Recommended for adolescents from the age of fifteen

Integer Examples

Logics 0.4 in

-975744÷44÷(12×22)=-84

Logics 1.4 in

992×(-676)=-670592

Logics 2.4 in

-34×(-152)×(-111)=-573648

Logics 3.4 in

-14×(27×10)=-3780

Logics 4.4 in

446×(-99360÷(-460))÷(-36)=-2676

Fraction Examples

Limited 0.3 fp

20519/819÷(2734/143+5075/429)=17/21

Limited 2.3 fp

(18039/221-35987/442)÷7/376=188/17

Complete 0.3 fn

295/182×(3/5-283/5)=-1180/13

Complete 2.3 fn

5/49÷(6/119+118/357)=15/56

Equations

4x²=29584

17x²=12393

3x²+210x=0

-x²-41x+1220=0

182x÷14y=13

x-y=89

36x÷9y=3

32y-9x=2553

7x-2y=-234

y-x=-29

-2160x÷72y=-60

47x+20y=-1230

Language Exercises

Russian Vocabulary 3.5

н вечно

English Vocabulary 3.5

conv nient

Lexicon 2.5

pron nciation [utterance]

Infinitive 2.3

cost [cost]

16+

Recommended for adolescents from the age of fifteen

Equations

-390x²+380250x=0

812x²=6005552

-490x²-377300x=0

2x²-892x+94458=0

144y÷64x=18

y×7x=2054808

70y+114x=162454

-162y÷27x=3

-y+x=101

-2x×34y=707472

-150x+760y=444400

Language Exercises

Infinitive 3.3

forsaken [forsake]

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