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+5=10

Beginner 2.1 ip

6-4=2

Beginner 3.1 ip

6-5=1

Step-by-step Tasks

2+1=3

1+1=2

2+5=7

2+3=5

7+1=8

5-2=3

3-1=2

3-2=1

9-1=8

7-2=5

6-3=3

Recommended for children from six years

Integer Examples

11+6=17

10-4=6

16+0=16

10-2-5=3

Step-by-step Tasks

2+8=10

3+9=12

8+2=10

4+8=12

3-3=0

9+5=14

4+7=11

6+7=13

3+5=8

2+7=9

2+3=5

2+7=9

8+9=17

5+9=14

6-2=4

10+6=16

5+8=13

4-4=0

9-5=4

10-3=7

15-4=11

5-2=3

10-6=4

13-7=6

10-5=5

16-8=8

16-7=9

10-9=1

20-5=15

19-10=9

Recommended for children from seven years

Integer Examples

1+4+5=10

69+22=91

75-21=54

53+12=65

6+14-7=13

1+(9-7)=3

Step-by-step Tasks

9+2=11

0+0=0

11-10=1

12+5=17

0+13=13

0+14=14

0+20=20

12+17=29

0+25=25

13+26=39

27+3=30

14-9=5

5-1=4

13-2=11

23-13=10

24-14=10

8-5=3

18-6=12

27-7=20

16-6=10

1×1=1

2×6=12

1×4=4

9÷1=9

Comparisons

Natural 1.1 ip

5 > 1

Natural 2.1 ip

8-2 < 1+6

Language Exercises

Russian Vocabulary 1.1

мак роны

Recommended for children from eight years

Integer Examples

4+11=15

255+725=980

705-207=498

957-106=851

52-48+6=10

10-(12-3)=1

11×4=44

96÷2=48

32÷4=8

74+26=100

59-10=49

78-23=55

Step-by-step Tasks

11+9=20

27-22=5

8+3=11

19+13=32

40+50=90

14+16=30

1+4+3=8

20-8=12

20-12=8

21-19=2

11-7=4

39-29=10

70-40=30

3×0=0

2×1=2

6×4=24

10×1=10

5×0=0

7×5=35

10×5=50

2×6=12

8×6=48

7×7=49

4×3=12

5×2=10

1×8=8

6×2=12

9×4=36

3×9=27

5×8=40

1×10=10

2÷2=1

4÷2=2

12÷3=4

12÷3=4

40÷4=10

6÷1=6

25÷5=5

18÷2=9

20÷2=10

12÷6=2

30÷5=6

14÷7=2

70÷7=10

20÷4=5

32÷8=4

35÷7=5

45÷9=5

45÷5=9

80÷8=10

100÷10=10

Comparisons

4 > 2

67 > 30

29+1 > 62-35

9×1 > 2×3

Equations

Linear 1.1 ip

10-x=1

Linear 2.1 ip

10×x=10

Language Exercises

Russian Vocabulary 1.2

н уклюжий

Russian Vocabulary 2.1

б тон

Russian Vocabulary 3.1

к бина

English Vocabulary 1.1

y rd

English Vocabulary 2.1

t xt

Lexicon 1.1

pot [blot]

Lexicon 2.1

h r [pronoun]

Recommended for children from nine years

Integer Examples

8+4=12

897+24-626=295

8+(21+71)=100

12×3=36

28×14=392

648÷4=162

38×24=912

28÷4÷7=1

27÷(3×3)=3

4×(8÷2)÷2=8

29÷9=3(2)

6800+743=7543

7000-6446=554

5643-4996=647

31×2=62

28÷2=14

8×4+28=60

40-30÷5×6=4

54÷3=18

48÷5=9(3)

Step-by-step Tasks

2×23=46

11×6=66

3×17=51

3×15=45

4×13=52

12×5=60

2×12=24

20×5=100

10×4=40

6×20=120

7×17=119

9×10=90

11×8=88

39×2=78

9×20=180

15×7=105

7×15=105

20×19=380

2×20=40

16÷2=8

99÷11=9

54÷3=18

2÷2=1

76÷4=19

85÷5=17

24÷2=12

64÷4=16

20÷10=2

18÷6=3

119÷7=17

56÷7=8

88÷8=11

80÷20=4

18÷9=2

60÷6=10

480÷10=48

108÷9=12

77÷11=7

Comparisons

45÷9 < 60÷6

87 < 580

96+250 > 67+278

100÷10 < 30×3

Equations

Linear 1.2 ip

71+x=80

Linear 2.2 ip

40÷x=4

Linear 3.1 ip

10-5×x=5

Language Exercises

Russian Vocabulary 1.3

пл тформа

Russian Vocabulary 2.2

ртист

Russian Vocabulary 3.2

азар

English Vocabulary 3.1

addi ion

10+

Recommended for children from ten years

Integer Examples

273+237+310=820

213862+93176=307038

791251-82566=708685

837697-262637=575060

343+(116+200)=659

19×(8÷2)×8=608

10×23=230

8435÷35=241

4200÷2=2100

8×8×12=768

1000÷(400÷40)=100

2×(10÷5)×100=400

90÷6=15

120000+352877=472877

503251-320000=183251

840216-352007=488209

7925×4=31700

5500×60=330000

185÷5=37

64-4×12=16

241+20÷4=246

260÷2-10×4=90

(9+8)÷(10+7)=1

810÷9=90

182÷17=10(12)

Comparisons

Natural 0.3 ip

2×24 < 4×19

Natural 1.4 ip

870157 > 40000

Natural 2.4 ip

385288+74712 < 994888-126225

Natural 3.3 ip

5×4 < 460÷2

Equations

x÷3=3

761-x=661

x×50=450

78÷x-1=1

2×(1+x)=10

Rounding

Round 1.1 ip

372≈37

Round 1.2 ip

9178≈92

Round 2.1 ip

475+89≈56

Language Exercises

Russian Vocabulary 2.3

и кусный

English Vocabulary 1.2

s ear

English Vocabulary 2.2

som

Lexicon 1.2

soft y [gently]

Lexicon 2.2

all w [let]

Infinitive 1.1

freeze froze [freeze]

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

904921-(273824-157234)=788331

Conversant 1.1 in

-1-2=-3

Conversant 1.5 in

-356865+968629=611764

-6+10-1=3

9072÷14=648

400÷50×1250=10000

1456÷(14÷7)=728

3520÷(2×2)÷40=22

271÷87=3(10)

50000×140=7000000

7479÷27=277

451×2-76÷19=898

1984+(75+277)÷22=2000

1633+1530÷85=1651

126÷14+168÷84=11

493-(710-658)×3=337

5979-(1475-897)÷34=5962

Divisor_ENG 1.3 ip

8449÷71=119

Remainder_ENG 1.3 ip

720÷8=90

Decimal Examples

5.4+1.6=7

52.3+57.1-18.4=91

8.3-6.3=2

47.1+3.6=50.7

1.7+1.5+1.4=4.6

58.5+95.5-75.6=78.4

9-(0.2+0.8)=8

65.9-(42.6-2)=25.3

27.6÷1.5=18.4

0.8×42.5=34

39.6÷0.8=49.5

38.4÷4=9.6

Divisional_ENG 1.1 dp

15.4÷7=2.2

Fraction Examples

Numerator 1.1 fp

3/10+1/5=1/2

Comparisons

Natural 0.4 ip

18469+181531 > 15000+34092

5×98 > 48300÷100

5 = 5

6 > -3

-4+10 > 2-8

6÷(-3) = 6÷(-3)

91.5 > 17.7

0.4+20.2 = 14.8+5.8

9/10 > 3/4

90/47 < 4/1

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

Equations

57÷(x-1)=19

93×x=651

62×x-326=294

(x+5)×5=30

300÷(3+x)=100

3-x=-3

x×(-5)=-10

Rounding

11.9≈12

73.2-9.5≈64

529≈53

4×2234≈89

252375+432481≈685

844542≈845

1780+667≈24

97327+55110≈152

410÷5≈8

4494÷2≈22

317850÷489≈1

Language Exercises

Russian Vocabulary 1.4

орг низм

Russian Vocabulary 3.3

дес тикратно

English Vocabulary 1.3

non ense

English Vocabulary 2.3

st ff

English Vocabulary 3.2

bus

Lexicon 1.3

min ral [inorganic]

Infinitive 2.1

quick-freeze [quick-freeze]

12+

Recommended for children from the age of twelve

Integer Examples

6-8+7=5

-5-2+1=-6

-73-(90-81)=-82

-9-7=-16

90-20=70

-3+10+3=10

-100+56+14=-30

10+(-9+1)=2

3+(-15+9)=-3

-66-(0-18)=-48

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

-(13+10)+(17-1)=-7

(97+48)-(25+73)=47

300×1800=540000

350×140=49000

424560÷120=3538

125×40=5000

1584÷528×511=1533

(200÷4)×1000=50000

240×(6÷3)×950=456000

5470×2657=14533790

18732÷28=669

6+(44-20)÷6=10

23+3×19=80

57÷3+2×10=39

-16-(8+2)÷2=-21

-16÷(-4)=4

-50÷5=-10

5×2÷10=1

(36÷(-2))÷2=-9

-4×(2×6)÷3=-16

36126÷27=1338

Decimal Examples

31.85+47.76=79.61

26.24-25.89=0.35

63.13-32.42-11=19.71

81-(59.17-50.16)=71.99

-5.2-1.6=-6.8

34.4-9.9-77=-52.5

-3.6-5.4=-9

-79.5+64=-15.5

-3.1-7+4=-6.1

-69.5+99.4-60.7=-30.8

-8+(-7.7+5.7)=-10

-40.3-(8.8+4)=-53.1

6÷10=0.6

20.4÷0.8=25.5

4.4×8=35.2

0.64×20=12.8

46.08÷1.44=32

4×0.06=0.24

27×2×0.1=5.4

10÷(0.5×0.8)=25

2.5×16.8-33.1=8.9

30.4+3.6÷9=30.8

51.7+4×0.2×2.5=53.7

(1.1+0.4)÷(8.6+6.4)=0.1

Negatory 1.1 dn

-32÷12.8+66=63.5

Negatory 2.1 dn

-12×0.3+1.6÷0.8=-1.6

Residual_ENG 1.1 dp

51÷10=5.1

Divisional_ENG 1.2 dp

0.74÷0.2=3.7

Fraction Examples

Numerator 0.1 fp

2/5-1/5=1/5

Numerator 0.2 fp

7/2+(135/34-59/17)=4/1

3/10+841/90=434/45

4/5-2/5-3/10=1/10

3/11-7/88+9/88=13/44

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

149/24-(73/11-7/11)=5/24

1/5+3/10+1/4=3/4

7/10-1/10=3/5

2/5-5/6+1/10=-1/3

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

1/3÷2/5=5/6

139/8÷973/44=11/14

14/3×3/2×1/7=1/1

2/8=1/4

550/572=25/26

1/3-1/2×1/6=1/4

Comparisons

-80 < 60

881 > 763

-26 < -24

-985 < -854

11+18 < 70-0

-119-609 < 360-610

-88÷(-2) > 2×20

-945÷(-105) < -776÷(-4)

1.8×5 = 45.9÷5.1

7.25 = 7.25

80 > 36.8

44.273 < 99.665

310.752 > 310.746

1.2+85.77 > 93.05-6.1

Point 2.3 dp

83.011-3.011 > 85.057-20.761

Point 3.1 dp

34.5×2 > 97.2÷8.1

Point 3.2 dp

24.49÷7.9 > 17.71÷5.75

-47.3 < 47.4

-60÷(-2) > 1.2×2

97 < 97.3

97.11 = 97.11

-1.2+100 > 54.4-37.4

2.8-36.26 < 46.49-8.25

Doted 3.1 dn

-67.1÷(-1.1) > 36×(-1.7)

Doted 3.2 dn

15×(-1.26) > 68.2÷(-1.24)

1/3÷4/9 > 1/5÷1/3

3/82 < 1/1

36889/440 > 563/7

405/44-157/28 < 1/2+179/28

Improper 2.3 fp

139/2-439/766 > 477/8-19/8

Improper 3.1 fp

4/5×5/6 = 1/3÷1/2

Improper 3.2 fp

13/3÷49/12 < 1/2÷1/19

Descent 1.1 fn

-3/4 < 1/5

Descent 1.2 fn

16/53 < 1/1

Descent 2.1 fn

1/1-5/8 < 1/4+1/4

Equations

x+10=6

27+x=-35

-x+12=-52

x+56=-24

-x×10=-100

x×80=-800

-3-x÷5=-5

67-70÷x=62

3÷(-x+9)=-3

-2×(98-x)=-72

Rounding

17.3÷26≈1

37.12+36.15≈73.3

90.51≈90.5

77.461≈77.46

45.64+15.81≈61.5

99.255-49.624≈49.63

10.1×6≈61

40.23÷20.5≈2

Language Exercises

Russian Vocabulary 2.4

орат р

English Vocabulary 3.3

se ing

Lexicon 2.3

fa rly [quite]

Infinitive 1.2

waylay waylaid [waylay]

Infinitive 3.1

overran [overrun]

13+

Recommended for adolescents from the age of thirteen

Integer Examples

Conversant 0.4 in

(281+450)-(997-290)=24

828000-168565=659435

662-617=45

310-770+758=298

-325759+772245-446486=0

Conversant 3.4 in

-172-(-877+488)=217

Conversant 3.5 in

-233498+(-575715+763305)=-45908

Conversant 4.4 in

(2+962)+(310-484)=790

Conversant 4.5 in

-(374359-5757)+(660000+443820)=735218

8480012÷659=12868

52÷2-236=-210

-720÷360+520=518

159+4×6+181=364

(-60-75)÷(15+12)=-5

-11×(-306÷(-3))÷(-22)=51

35×(-26)=-910

-20×25÷2=-250

(-1000÷(-2))÷2=250

-8×8×(-2×4)=512

9852759÷567=17377

Decimal Examples

Partitive 0.4 dp

461.965+76+149.369=687.334

Partitive 1.4 dp

11+151=162

Partitive 2.4 dp

100+282.387-273.755=108.632

Partitive 3.4 dp

375.736-(36+16.85)=322.886

Split 0.3 dn

63.09+23.56=86.65

Split 0.4 dn

-544.409+274.409=-270

Split 1.3 dn

2.59+68=70.59

Split 1.4 dn

581.172-141.613=439.559

Split 2.3 dn

23.93+45.83-59.2=10.56

Split 2.4 dn

-88+222.698+535.302=670

Split 3.3 dn

73.31-(-15.54-1.61)=90.46

Split 3.4 dn

-403.384+(226-568.333)=-745.717

32÷20=1.6

0.018÷2=0.009

3.75×4=15

18.81÷13.75=1.368

1.375×17.92=24.64

2.64÷1.32=2

1.38÷0.69=2

2÷0.08×0.32=8

3.125×12.8×0.88=35.2

(1.2×0.3)÷0.02=18

15.36÷(2.4÷3.125)=20

36.87+0.2÷(80.88-80.8)=39.37

Definition 1.2 dp

36.48÷3-5.06=7.1

Definition 1.3 dp

37.8÷0.8-44.988=2.262

Definition 2.2 dp

71.87-31.36÷0.98-37.93=1.94

Definition 2.3 dp

19.344+5.76÷48+25.693=45.157

Definition 3.2 dp

3×(3.72+3.55)÷3=7.27

Negatory 0.1 dn

94.3+2÷0.8-77.3=19.5

Negatory 0.2 dn

-41.5-4÷0.5÷6.4=-42.75

Negatory 1.2 dn

-23.04÷72-89.74=-90.06

Negatory 1.3 dn

65.8-1.728×6.25=55

Negatory 2.2 dn

84.33+1.2÷20+15.61=100

Negatory 2.3 dn

-25.28+6.4×0.005+55.931=30.683

Negatory 3.1 dn

-41.4-81÷(6.4+9.8)=-46.4

Negatory 3.2 dn

8×(42.09-32.09)×0.01=0.8

Residual_ENG 1.2 dp

54÷25=2.16

Divisional_ENG 1.3 dp

0.048÷0.01=4.8

Fraction Examples

Numerator 0.3 fp

1/4+(47/452+2446/113)=22/1

Numerator 1.3 fp

1/42+15943/371=13673/318

Numerator 2.3 fp

508/57+4133/114+35941/669=44105/446

Numerator 3.3 fp

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

Denominator 0.2 fn

33/20-(1/5+9/20)=1/1

Denominator 1.2 fn

-657/74+637/74=-10/37

Denominator 1.3 fn

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

Denominator 2.2 fn

-19/49-142/49+2/7=-3/1

Denominator 3.2 fn

1/5-(1/2-3/10)=0/1

Fragment 0.1 fp

1/2÷3/4×9/7=6/7

Fragment 0.2 fp

63/22×(3/4×440/27)=35/1

Fragment 1.3 fp

61/2÷244/77=77/8

Fragment 2.2 fp

11/4×1/11×1038/25=519/50

Fragment 2.3 fp

38/3÷380/21÷84/55=11/24

Fragment 3.1 fp

1/7÷(2/5×5/2)=1/7

Fragment 3.2 fp

28/5÷(3/4÷3/40)=14/25

Reduction 1.3 fp

56368/572=1084/11

Limited 0.1 fp

5/4+1/3÷2/9=11/4

Limited 1.2 fp

89/2-1/2×3/16=1421/32

(86/9-53/9)÷2/5=55/6

-1/6×21/4-15/8=-11/4

3/4×50/9+5/2=20/3

-286/9÷550/21+4/5=-31/75

Complete 2.1 fn

1/7×(19/4+9/4)=1/1

Comparisons

Ceil 0.4 in

-22000 < 978611

Ceil 1.4 in

-104464 > -559399

Ceil 2.4 in

-277008-152992 < -246016+935177

Ceil 3.4 in

-267784÷2 > 897594÷(-2)

Point 0.3 dp

10.071 < 51.284

Point 0.4 dp

388.994 < 795.415

Point 2.4 dp

275.032+76.911 > 864.109-512.178

Point 3.3 dp

90.566÷6.469 > 1.92×1.4

Point 3.4 dp

3.8×23.46 < 161.394÷1.11

Doted 0.3 dn

-92+41 > -91.036+40.026

Doted 1.3 dn

18 < 40.871

Doted 1.4 dn

2.314 > -834.886

Doted 2.3 dn

27.506-81.477 < -12.435+66.41

Doted 2.4 dn

-438.891-258.86 < 405.505+292.242

Doted 3.3 dn

-6.075×1.36 < 49.458÷(-6)

Improper 0.3 fp

473/10 < 11159/150

Improper 3.3 fp

698/815÷349/25 < 23/2÷3749/74

Descent 0.1 fn

-8/9 < 3/4

Descent 0.2 fn

-1/1-125/44 > -281/34+74/17

Descent 1.3 fn

-86480/869 < 3796/209

Descent 2.2 fn

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

Descent 3.1 fn

-1/2÷(-3/4) > -5/6×(-3/5)

Descent 3.2 fn

5/1×(-73/50) < 4/11÷(-16/33)

Equations

2×(-x+375)=750

x×29+942=-798

-60×(865-x)=540

x-y=9

Rounding

Rounding 0.3 dp

38.306-18.454≈19.85

Rounding 3.3 dp

100÷1.25≈80

Language Exercises

Russian Vocabulary 1.5

дъюнкт

Russian Vocabulary 3.4

с туация

English Vocabulary 1.4

rema ning

English Vocabulary 2.4

str king

Lexicon 1.4

associ tion [union]

Infinitive 2.2

outshoot [outshoot]

14+

Recommended for adolescents from the age of fourteen

Integer Examples

Intellect 0.3 in

586×43-392÷196=25196

Intellect 1.3 in

-151×82-927=-13309

Intellect 2.3 in

6522+612÷18-1891=4665

Intellect 3.3 in

1694+(2103-977)×50=57994

-15×(-60)÷50=18

-2500÷10=-250

952÷(-34)×95=-2660

(4×400)÷(-100)=-16

4×(-46÷(-2))×(-42)=-3864

Decimal Examples

48÷2=24

47.52×0.2=9.504

17.25×0.004=0.069

9.072÷0.648=14

8×0.001=0.008

0.76÷6.08÷125=0.001

1.056÷(1.28×6.6)=0.125

Definition 0.3 dp

37.078-12×0.58×3.125=15.328

Definition 0.4 dp

100.006-453.6÷672÷7.5=99.916

Definition 1.4 dp

7.92×0.25+509.359=511.339

Definition 2.4 dp

377.604-38.556÷0.765-177.715=149.489

Definition 3.3 dp

20.168+(1.552+2.768)×1.35=26

Definition 3.4 dp

(566.687-566.607)÷(0.532+1.468)=0.04

Negatory 0.3 dn

18.28+81.328÷(93.353-70.353)=21.816

Negatory 0.4 dn

-12.5÷(767.52-768.02)÷0.08=312.5

Negatory 1.4 dn

-380.53+405×0.026=-370

Negatory 2.4 dn

-133.7+19.2×2-414.7=-510

Negatory 3.3 dn

(-9.304-1.1)÷(-20-31)=0.204

Negatory 3.4 dn

410+826.2÷(0.877+1.248)=798.8

Residual_ENG 1.3 dp

27÷12=2.25

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

197/9+(604/9-5281/899)=74730/899

Fragment 0.3 fp

75/2÷1/2=75/1

Fragment 3.3 fp

17/24×(19/34×24/19)=1/2

Limited 0.2 fp

649/32÷(7/9-23/72)=177/4

Limited 1.3 fp

1/8×3424/643-274/643=154/643

Limited 2.2 fp

(275/7+145/7)×31/60=31/1

Complete 0.2 fn

(702/19+324/19)÷111/67=1206/37

Complete 1.3 fn

-31/2÷93/251+293/6=7/1

Complete 2.2 fn

-(3/4+1/20)×65/2=-26/1

Comparisons

Doted 0.4 dn

231.055+124.497 < 954.205-88.785

Doted 3.4 dn

43.2×(-13) < 19.5×28.8

Descent 0.3 fn

-817/379+99/1 > -1/2-961/10

Descent 2.3 fn

-1379/58+193/2 > 511/11-115/11

Descent 3.3 fn

-39/11÷(-2841/143) > -402/5÷134/125

Equations

7x²-35x=0

7x²=112

x²+5x=0

x²+2x-24=0

y-x=3

y+x=76

90y÷10x=30

9y+5x=140

9y-8x=-146

y+x=13

-144x÷4y=-108

8y-8x=160

Language Exercises

Russian Vocabulary 2.5

толл

English Vocabulary 1.5

extra rdinary

English Vocabulary 2.5

comm nication

English Vocabulary 3.4

themsel es

desp rately [badly]

hotograph [image]

shake shaken [shake]

becomebikm [become]

15+

Recommended for adolescents from the age of fifteen

Integer Examples

Logics 0.4 in

-19×26÷(4199÷(-221))=26

Logics 1.4 in

-319×610=-194590

Logics 2.4 in

-230400÷96÷(-75)=32

Logics 3.4 in

-15×(-160×(-25))=-60000

Logics 4.4 in

-17×(-39)×(10×24)=159120

Fraction Examples

Limited 0.3 fp

1/3×7/3-1/36=3/4

Limited 2.3 fp

(81/133-4/7)×741/140=39/196

Complete 0.3 fn

-831/31÷(1/2-139/2)=277/713

Complete 2.3 fn

1273/324×(-3/19-1/19)=-67/81

Equations

-2x²+26x+280=0

7x²=51772

20x²-1200x=0

-x²+8x+48=0

2x+56y=5174

x-y=47

69x÷23y=2

60x-20y=60

-39y-36x=-540

-y-x=-4

-260x÷2y=-871

-33x-5y=-2830

Language Exercises

Russian Vocabulary 3.5

заму

English Vocabulary 3.5

signific nt

Lexicon 2.5

del berate [ponder]

Infinitive 2.3

beheld [behold]

16+

Recommended for adolescents from the age of fifteen

Equations

2x²-544x+25134=0

117x²=4916925

276x²+2760x=0

-2x²-656x-51054=0

4y×x=130680

10y×3x=614400

132x+108y=93720

-y+x=530

-y-x=704

y×4x=146880

400y+130x=144200

Language Exercises

Infinitive 3.3

outsell [outsell]

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