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

5+4=9

Beginner 2.1 ip

6-4=2

Beginner 3.1 ip

7-1=6

Step-by-step Tasks

4+1=5

1+1=2

2+5=7

3+0=3

1+9=10

2-1=1

6-3=3

7-1=6

1-1=0

4-2=2

10-3=7

Recommended for children from six years

Integer Examples

1+14=15

20-3=17

15-6=9

3+2+4=9

Step-by-step Tasks

7+2=9

9+3=12

3+7=10

4+8=12

3-3=0

5+9=14

4+7=11

6+7=13

3+8=11

7+4=11

3+7=10

2+7=9

8+2=10

9+8=17

2-1=1

10+7=17

5+10=15

7-4=3

8-5=3

10-1=9

13-3=10

14-4=10

13-6=7

14-7=7

7-2=5

14-8=6

16-7=9

12-9=3

20-0=20

14-10=4

Recommended for children from seven years

Integer Examples

8-(1+6)=1

1+94=95

57-34=23

48-4=44

18-1-5=12

9-(2+6)=1

Step-by-step Tasks

9+2=11

0+0=0

10-10=0

22+4=26

13+7=20

14+4=18

5+10=15

14+16=30

2+25=27

6+12=18

7+9=16

15-8=7

18-1=17

3-2=1

10-3=7

14-4=10

6-5=1

18-6=12

12-7=5

20-20=0

1×5=5

8×2=16

1×1=1

3÷1=3

Comparisons

Natural 1.1 ip

8 > 4

Natural 2.1 ip

7+2 > 1+1

Language Exercises

Russian Vocabulary 1.1

од ванчик

Recommended for children from eight years

Integer Examples

19-12=7

221+746=967

916-26=890

665-589=76

96-6-20=70

20-(20-13)=13

4×10=40

91÷7=13

32÷4=8

56+30=86

92-14=78

30-10=20

Step-by-step Tasks

12+8=20

27-22=5

8+13=21

21+19=40

90+10=100

14+16=30

1+2+4=7

27-8=19

20-12=8

16-9=7

14-6=8

20-0=20

100-60=40

3×0=0

1×6=6

4×2=8

10×1=10

5×0=0

7×2=14

10×2=20

10×6=60

9×6=54

5×7=35

9×6=54

8×5=40

1×8=8

8×10=80

9×3=27

6×3=18

5×4=20

10×8=80

16÷2=8

20÷2=10

18÷3=6

16÷2=8

36÷4=9

8÷1=8

15÷5=3

0÷4=0

20÷2=10

30÷6=5

40÷5=8

14÷7=2

0÷4=0

20÷4=5

80÷8=10

0÷8=0

63÷9=7

35÷5=7

80÷2=40

60÷10=6

Comparisons

10 > 4

86 > 70

1+0 < 44+30

4×2 > 10÷2

Equations

Linear 1.1 ip

4+x=6

Linear 2.1 ip

x÷8=1

Language Exercises

Russian Vocabulary 1.2

ул ца

Russian Vocabulary 2.1

учебн к

Russian Vocabulary 3.1

чер з

English Vocabulary 1.1

d ty

English Vocabulary 2.1

t xt

Lexicon 1.1

ag in [anew]

Lexicon 2.1

pl yer [gambler]

Recommended for children from nine years

Integer Examples

10+7+44=61

400-284+884=1000

86-(84-28)=30

8÷2=4

28×21=588

316÷4=79

244÷4=61

5×2×8=80

(2×10)÷4=5

4×(8÷2)÷2=8

59÷10=5(9)

4320+5659=9979

4393-1358=3035

9000+1000=10000

23×3=69

72÷3=24

72÷2-16=20

48×2-44÷4=85

54÷3=18

27÷3=9

Step-by-step Tasks

2×21=42

2×11=22

3×11=33

20×3=60

19×4=76

5×18=90

12×3=36

12×2=24

3×20=60

19×6=114

7×14=98

6×15=90

8×15=120

16×5=80

11×9=99

19×9=171

7×5=35

10×14=140

2×15=30

14÷2=7

44÷11=4

51÷3=17

30÷3=10

0÷4=0

40÷5=8

24÷6=4

32÷2=16

100÷10=10

60÷6=10

84÷7=12

140÷7=20

104÷8=13

125÷5=25

18÷9=2

114÷6=19

490÷10=49

7÷1=7

40÷5=8

Comparisons

45÷9 < 60÷6

125 < 539

272+136 < 645+205

50÷5 < 4×13

Equations

Linear 1.2 ip

x+40=91

Linear 2.2 ip

20×x=80

Linear 3.1 ip

8+4÷x=9

Language Exercises

Russian Vocabulary 1.3

т пор

Russian Vocabulary 2.2

ж лтеть

Russian Vocabulary 3.2

д ревня

English Vocabulary 3.1

c r

10+

Recommended for children from ten years

Integer Examples

654-11=643

82954+225573=308527

913968-178803=735165

379990+206282=586272

420+(590-60)=950

5×(6×10)=300

56×72=4032

240÷12=20

8408÷8=1051

40×5÷8=25

(69÷3)÷23=1

8×4×(2×10)=640

136÷18=7(10)

228155+440000=668155

820119-816514=3605

335048-259942=75106

9047×2=18094

2541×86=218526

642÷6=107

64-4×12=16

538+13×18=772

274-46×2÷23=270

(37+23)÷(58-48)=6

532÷2=266

124÷18=6(16)

Comparisons

Natural 0.3 ip

920÷10 < 12×8

Natural 1.4 ip

369715 > 191998

Natural 2.4 ip

556069-472685 < 282987+529037

Natural 3.3 ip

1000÷20 < 813÷3

Equations

3+1×x=8

x+136=763

864÷x=36

x÷47+57=59

9÷(x+1)=3

Rounding

Round 1.1 ip

256≈26

Round 1.2 ip

7036≈70

Round 2.1 ip

475+89≈56

Language Exercises

Russian Vocabulary 2.3

оз рничать

English Vocabulary 1.2

b droom

English Vocabulary 2.2

b nd

Lexicon 1.2

ph ne [call]

Lexicon 2.2

Wedn sday [day of the week]

Infinitive 1.1

overrun overran [overrun]

11+

Recommended for children from the age of eleven

Integer Examples

Beginner 0.5 ip

452220-(652958-560738)=360000

Beginner 4.5 ip

830000-419071+290692=701621

Beginner 5.5 ip

414616+(231968+265750)=912334

Conversant 1.1 in

-4+4=0

Conversant 1.5 in

-170136-29800=-199936

-10+4-4=-10

9072÷14=648

4680÷78×24=1440

(100×18)÷24=75

51×17×(10÷2)=4335

370÷6=61(4)

8118×869=7054542

3311÷11=301

(810-270)÷(305-302)=180

Numeracy 0.3 ip

(1791-1341)÷(20+10)=15

2000-176÷44=1996

250+560÷14+1663=1953

864-(132+24)÷2=786

6428-(5842-5678)×27=2000

Divisor_ENG 1.3 ip

5200÷16=325

Remainder_ENG 1.3 ip

238÷24=9(22)

Decimal Examples

0+(4.7+0.8)=5.5

49.5-(11.9+33.2)=4.4

9.6-2.5=7.1

0.9+71.2=72.1

2.5+6+0.1=8.6

91.9-40-49.9=2

2.2+(2+1.3)=5.5

31.4+(63.7-39)=56.1

5.7÷1.5=3.8

6.8×8=54.4

97.2÷1.5=64.8

1.8×5=9

Divisional_ENG 1.1 dp

15.4÷7=2.2

Fraction Examples

Numerator 1.1 fp

1/3-1/6=1/6

Comparisons

916868 < 966303

490000÷50 > 544×18

-3 < 7

7 < 10

-9+2 < -2+3

8÷4 < 8÷2

32 < 78.2

89.4-60.8 > 76-62.2

1/10 < 2/3

347/67 > 4/5

1/2+1/8 < 5/6-1/6

Equations

(x-70)×8=80

x×90=630

670÷x-1=66

(x+5)×5=30

(5+x)×148=740

x-10=-4

x÷(-7)=-1

Rounding

79.2≈79

73.2-9.5≈64

97+168≈27

304+2279≈26

727×1288≈936

674799≈675

6143-1716≈44

659654+74041≈734

5×25≈13

8394÷3≈28

183×4033≈738

Language Exercises

Russian Vocabulary 1.4

ор ентация

Russian Vocabulary 3.3

нварский

English Vocabulary 1.3

interes

English Vocabulary 2.3

str ggle

English Vocabulary 3.2

cl an

Lexicon 1.3

loca ion [place]

Infinitive 2.1

smote [smite]

12+

Recommended for children from the age of twelve

Integer Examples

6-8+7=5

12+(8-4)=16

-51+41=-10

-20+3=-17

-56-21=-77

-9-7+0=-16

-67-66+100=-33

3+(8-1)=10

0-(-2-16)=18

-7-(38+22)=-67

(0+7)-(6-0)=1

-(9-19)-(11+5)=-6

(30+84)+(64-97)=81

4×2×3125=25000

965×76=73340

618240÷2576=240

930000÷125=7440

71×21×615=916965

(500÷2)×40=10000

66÷2×(740×22)=537240

43000×1131=48633000

37200÷10=3720

24+(-26-15)×3=-99

8-32÷4=0

30-100÷5÷10=28

(100-10)÷(13-4)=10

22÷(-2)×9=-99

5×2=10

4×2×8=64

90÷(45÷(-9))=-18

10×(-3)÷(5×(-2))=3

27246÷19=1434

Decimal Examples

Partitive 0.3 dp

1.18+13.67+21.89=36.74

Partitive 1.3 dp

81.69-52.51=29.18

Partitive 2.3 dp

67.12+70.42-50=87.54

Partitive 3.3 dp

67.75-(59.93-14.71)=22.53

-5.2-1.6=-6.8

-1.9+7=5.1

6.3-4.4=1.9

-3-19.1=-22.1

9.3-7.6+7.8=9.5

-20.1-31.7-48.2=-100

0.8+(1-9.7)=-7.9

10+(28-85.7)=-47.7

48÷6=8

1.26÷0.18=7

4.4×8=35.2

2.2×1.05=2.31

43.2÷72=0.6

8×0.27=2.16

82.8÷23÷4.5=0.8

(0.6×4)÷4.8=0.5

5.2÷0.8+5.2÷52=6.6

46.6-2.5×4=36.6

2.8÷0.5-3×1.1=2.3

19.8÷(3.4+5.6)÷22=0.1

Negatory 1.1 dn

6×1.8+1.4=12.2

Negatory 2.1 dn

-34÷8.5+0.6×30=14

Residual_ENG 1.1 dp

18÷3=6

Divisional_ENG 1.2 dp

45.24÷3.77=12

Fraction Examples

8/9-1/9-1/3=4/9

189/29-182/29=7/29

1/11+53/22=5/2

7/9-4/9+1/2=5/6

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

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

1/2+(65/46+2/23)=2/1

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

-1/8-3/4=-7/8

-1/5+6/7-4/5=-1/7

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

3/2×10/7=15/7

92/7÷460/21=3/5

14/3×3/2×1/7=1/1

126/45=14/5

828/24=69/2

3/5+1/2÷5/6=6/5

Comparisons

15÷(-5) > -40÷10

-833+766 < 5+55

-9 < 10

-892 < -756

-45-5 < -40-9

24+386 < 138+529

-11×8 < 96÷(-2)

-9×(-54) < -24×(-21)

38.4 > 1.7

0.92+26.19 < 3.81+80.64

50 > 42.67

44.273 < 99.665

879.642 < 950.264

96.8-25.14 > 66.5-7.5

Point 2.3 dp

87.041-0.599 > 0.046+0.028

12.5×2.4 > 57.2÷6.5

28×1.8 > 18.36÷2

-47.3 < 47.4

-77.16 < 89

-89.7 < 35

87.32 > 87.31

-49-1 < -31.6+75.9

-6.8-13.84 > 24.28-78.3

Doted 3.1 dn

-4×(-0.8) > 90.6÷(-3)

Doted 3.2 dn

-76.32÷(-1.44) > 3.2×2.8

Improper 0.1 fp

3/4×4/5 > 1/2×1/5

Improper 0.2 fp

7/10×60/7 > 2/5×45/16

Improper 1.3 fp

36889/440 > 563/7

Improper 2.2 fp

163/29-97/29 < 181/19-126/95

Improper 2.3 fp

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

Improper 3.1 fp

2/3×1/2 < 2/9÷1/3

Improper 3.2 fp

11/13÷33/14 < 2/3÷65/99

Descent 1.1 fn

-2/7 < 2/7

Descent 1.2 fn

12/13 > 1/2

Descent 2.1 fn

-1/5+2/5 < -5/9+8/9

Equations

-1+x÷7=-1

-15×(-x)=60

35+x=75

-x-793=-463

-x÷5=4

28×(-x)=-868

10÷x+8=9

-1+x×8=-1

-(-5-x)×2=-10

20×(78+x)=0

Rounding

10.4×3≈31

19.91÷5≈4

58.34≈58.3

17.177≈17.18

37.17+22.84≈60

13.293+4.325≈17.62

25×1.4≈35

98.2÷25.56≈3.8

Language Exercises

Russian Vocabulary 2.4

эт кет

English Vocabulary 3.3

massi e

Lexicon 2.3

some ne [person]

Infinitive 1.2

let let [let]

Infinitive 3.1

see [see]

13+

Recommended for adolescents from the age of thirteen

Integer Examples

Conversant 0.4 in

617+(-943+646)=320

Conversant 0.5 in

-838313+779082=-59231

Conversant 1.4 in

662-617=45

Conversant 2.4 in

310-770+758=298

Conversant 2.5 in

-453879-161703+35582=-580000

Conversant 3.4 in

-511-(510-659)=-362

Conversant 3.5 in

583000-(856644-390000)=116356

Conversant 4.4 in

-(695-404)+(581-440)=-150

Conversant 4.5 in

(228929-350682)+(340000+432050)=650297

2626293÷373=7041

(730-880)÷(-6-9)=10

655-4×403=-957

700+10×4×2=780

(976-64)÷(104-96)=114

760÷40=19

-10×(-20)=200

-36×(-2)×9=648

-700÷(2×25)=-14

-720÷(-36÷3)÷15=4

1275445÷265=4813

Decimal Examples

Partitive 0.4 dp

18-18=0

Partitive 1.4 dp

258.189+361.811=620

Partitive 2.4 dp

399.054-63.768+347.714=683

Partitive 3.4 dp

225.89-(73-37.89)=190.78

Split 0.3 dn

-40+43.29=3.29

Split 0.4 dn

370.1-(-19.537+570)=-180.363

Split 1.3 dn

-34.48-40.27=-74.75

Split 1.4 dn

581.172-141.613=439.559

Split 2.3 dn

84.22-90-39.26=-45.04

Split 2.4 dn

-71.286+418.958-603.672=-256

Split 3.3 dn

-58.66-(5.16+20.98)=-84.8

Split 3.4 dn

-103.502+(-187.812+303.314)=12

73÷25=2.92

0.013÷0.04=0.325

7.2÷15=0.48

70.56÷49=1.44

2.5×5.904=14.76

50.388÷4=12.597

79.596÷4.752=16.75

0.8×0.5×24.3=9.72

66×0.176÷0.704=16.5

0.6÷(27.05÷5.41)=0.12

Denary 5.3 dp

(35.858÷17.929)×0.002=0.004

Definition 0.2 dp

79.23-31.25×0.64=59.23

Definition 1.2 dp

36.48÷3-5.06=7.1

Definition 1.3 dp

39.788-4.68÷2.08=37.538

Definition 2.2 dp

5.6×0.5-1.2÷1.5=2

Definition 2.3 dp

3.344÷0.836-8×0.032=3.744

3×(3.72+3.55)÷3=7.27

11+28.5×1.2+2.8=48

-21.28+41.6÷1.25=12

-41.86÷1.82+25.47=2.47

Negatory 1.3 dn

38.042+0.54×52=66.122

Negatory 2.2 dn

100-10÷2.5-79=17

Negatory 2.3 dn

20+10×0.033+41.27=61.6

Negatory 3.1 dn

(1.7+85)÷(-0.5-25)=-3.4

Negatory 3.2 dn

1.32÷(29.16-33.16)×14=-4.62

Residual_ENG 1.2 dp

5÷50=0.1

Divisional_ENG 1.3 dp

0.028÷0.032=0.875

Fraction Examples

Numerator 0.3 fp

7531/86+401/86=3966/43

Numerator 1.3 fp

2437/95+1108/95=709/19

Numerator 2.3 fp

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

Numerator 3.3 fp

707/13+(528/13-5/16)=1515/16

1/2-(-1/10-2/5)=1/1

14/5-143/60=5/12

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

-3/2-3/2-47/9=-74/9

-6/13-(-14/39-4/39)=0/1

7/3×4/3÷32/9=7/8

1/19×19/3÷1/2=2/3

49/96×2586/49=431/16

1/2÷3/32×117/16=39/1

3/5÷3/17×470/17=94/1

10/3×(3/2÷5/2)=2/1

189/40÷(21/13÷7/39)=21/40

57920/880=724/11

5/4+1/3÷2/9=11/4

8/9÷1/41-67/9=29/1

(1/2+1/6)÷2/3=1/1

5/2÷15/8+8/9=20/9

-1/2×4/3-22/3=-8/1

1037/35+3/4×308/15=1576/35

Complete 2.1 fn

-14/3×(-4/5-6/5)=28/3

Comparisons

Ceil 0.4 in

-5×(-4) > 875112÷(-8)

Ceil 1.4 in

98995 > -943987

Ceil 2.4 in

-910920+128402 < -370576+776268

-2×8 > 168000÷(-4)

80.032 > 9.426

7.28×7.5 < 1.875×240

280.564+165.62 = 730-283.816

Point 3.3 dp

41.94÷3.495 < 62.5×0.64

Point 3.4 dp

3.36×6.75 < 102.4×3.125

Doted 0.3 dn

-6.4×3.125 < -32.14÷(-1.607)

Doted 1.3 dn

-46.331 < 52

Doted 1.4 dn

707 > 650

Doted 2.3 dn

0.666+6.49 < 22.547-4.547

Doted 2.4 dn

-608.343+941.567 < 43+534.115

Doted 3.3 dn

-52.38÷(-1.746) > 97.648÷5.744

Improper 0.3 fp

544/891+55534/891 > 725/18-2777/126

Improper 3.3 fp

97/4÷582/851 > 2/5÷14/25

Descent 0.1 fn

-1/3÷(-3/5) > -2/5×(-1/2)

Descent 0.2 fn

-5/1 < -7/8

Descent 1.3 fn

53437/604 > -13406/151

Descent 2.2 fn

2/1+8/15 < 8/5+223/95

Descent 3.1 fn

-1/10÷(-1/8) > -2/5÷(-4/7)

Descent 3.2 fn

3/8÷1/16 = 9/1×2/3

Equations

32×(-x)=960

-555+29×x=460

99×(-x+7)=396

y+x=10

Rounding

Rounding 0.3 dp

2.193×30.124≈66.06

Rounding 3.3 dp

0.709×40.284≈28.56

Language Exercises

Russian Vocabulary 1.5

наскво ь

Russian Vocabulary 3.4

с туация

English Vocabulary 1.4

est blish

English Vocabulary 2.4

men ion

Lexicon 1.4

basi [main]

Infinitive 2.2

shoe [shoe]

14+

Recommended for adolescents from the age of fourteen

Integer Examples

Intellect 0.3 in

-6712-(92+1333)×53=-82237

Intellect 1.3 in

140+2304÷24=236

Intellect 2.3 in

-4070+51842÷23÷49=-4024

Intellect 3.3 in

1694+(2103-977)×50=57994

Logics 0.3 in

-3432÷(33÷3)=-312

Logics 1.3 in

572÷(-4)=-143

Logics 2.3 in

-4788÷(-2)÷(-2)=-1197

Logics 3.3 in

1260÷(5×(-7))=-36

Logics 4.3 in

3672÷(-2)÷(-17×(-4))=-27

Decimal Examples

Residual 1.3 dp

7÷56=0.125

Denary 0.4 dp

9.576×2.5×0.85=20.349

27.625×32=884

7.176÷2.4=2.99

0.6×0.06=0.036

237.6×2÷600=0.792

(4×0.011)÷2=0.022

37.078-12×0.58×3.125=15.328

Definition 0.4 dp

(208.3-205.175)×(96.287+36.769)=415.8

Definition 1.4 dp

867.991-24÷15.625=866.455

Definition 2.4 dp

93.75×6.656+319.2÷4.2=700

Definition 3.3 dp

(0.5+0.75)×(84.706-44.706)=50

Definition 3.4 dp

800.436-(39.298+325.202)÷7.29=750.436

Negatory 0.3 dn

50.5-(0.652+0.158)×50=10

Negatory 0.4 dn

-876.24-(1.227+11.773)×9.52=-1000

Negatory 1.4 dn

2.7×17.55-15.385=32

Negatory 2.4 dn

475.958+720÷11.25÷51.2=477.208

Negatory 3.3 dn

-43.69-91.392÷(32.875-49.875)=-38.314

Negatory 3.4 dn

597.818+(13.425+5.575)×4.232=678.226

Residual_ENG 1.3 dp

58÷100=0.58

Fraction Examples

Denominator 0.3 fn

-23984/369-(-28/41-23486/369)=-2/3

Denominator 2.3 fn

44/9+55/9+10332/607=17009/607

Denominator 3.3 fn

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

Fragment 0.3 fp

1/2×9/2÷1/16=36/1

Fragment 3.3 fp

13/58÷(19/2×1/19)=13/29

Limited 0.2 fp

(1/2+2/3)×116/3=406/9

Limited 1.3 fp

1108/13-10/13÷5/86=72/1

Limited 2.2 fp

(178/9-685/36)×604/29=453/29

Complete 0.2 fn

175/87×(-79/10-19/2)=-35/1

Complete 1.3 fn

-1196/21+14/33÷98/85=-4357/77

Complete 2.2 fn

392/61÷(173/8+219/8)=8/61

Comparisons

Doted 0.4 dn

-438.714+756.739 > 82.342-199.254

Doted 3.4 dn

43.2×(-13) < 19.5×28.8

Descent 0.3 fn

-1110/47÷(-3774/109) < -75/1×(-1063/825)

Descent 2.3 fn

299/785+46/785 > -3339/157+3183/157

Descent 3.3 fn

-39/11÷(-2841/143) > -402/5÷134/125

Equations

4x²=64

6x²=216

-2x²+8x=0

x²+9x+14=0

8x-4y=16

x+y=180

6x÷5y=2

10y+2x=88

3y+6x=-30

y+x=-3

-20y÷5x=1

-5y+5x=0

Language Exercises

Russian Vocabulary 2.5

толл

English Vocabulary 1.5

del berately

English Vocabulary 2.5

unre sonable

English Vocabulary 3.4

ei hteenth

Lexicon 1.5

circ mstance [fact]

Lexicon 2.4

fort eth [count]

Infinitive 1.3

withdraw withdrew [withdraw]

Infinitive 3.2

beseech [beseech]

15+

Recommended for adolescents from the age of fifteen

Integer Examples

Logics 0.4 in

7992÷(-296)×490=-13230

Logics 1.4 in

-3960÷88=-45

Logics 2.4 in

-10000÷(-20)÷10=50

Logics 3.4 in

-25×(128×(-250))=800000

Logics 4.4 in

21×(-9120÷(-228))×(-316)=-265440

Fraction Examples

Limited 0.3 fp

8/19÷16/855+12935/466=11710/233

Limited 2.3 fp

159/11÷(5/7-3/7)=1113/22

Complete 0.3 fn

295/182×(3/5-283/5)=-1180/13

Complete 2.3 fn

-17460/289÷(494/5-1694/17)=2425/34

Equations

-2x²+26x+280=0

42x²=9450

-29x²+1740x=0

x²+95x+450=0

6x×5y=65610

y-x=589

y×9x=45000

40y+63x=7137

-x-y=79

y+x=179

-4x×15y=-53760

-33x-5y=-2830

Language Exercises

Russian Vocabulary 3.5

надв е

English Vocabulary 3.5

c pacity

Lexicon 2.5

s bstitute [replacement]

Infinitive 2.3

beset [beset]

16+

Recommended for adolescents from the age of fifteen

Equations

977x²+306778x=0

14x²=201600

-370x²-335590x=0

3x²+288x+6045=0

40y-40x=24440

72000y÷20x=9000

150x+131y=145362

-x-y=236

-y-x=-72

-792x÷33y=-842

821y+122x=-644484

Language Exercises

Infinitive 3.3

sightread [sight-read]

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