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

4+6=10

Beginner 2.1 ip

4-1=3

Beginner 3.1 ip

6-5=1

Step-by-step Tasks

4+1=5

2+3=5

1+6=7

1+3=4

3+1=4

4-2=2

4-1=3

3-2=1

9-1=8

7-2=5

8-3=5

Recommended for children from six years

Integer Examples

11+6=17

10-4=6

16-4=12

6+1+3=10

Step-by-step Tasks

4+2=6

6+3=9

5+3=8

7+4=11

4+0=4

5+4=9

6+2=8

6+5=11

6+6=12

3+7=10

8+7=15

3+3=6

8+2=10

5+9=14

3+1=4

10+4=14

5+10=15

8-4=4

10-5=5

10-1=9

15-4=11

14-4=10

16-6=10

14-7=7

13-3=10

9-8=1

11-8=3

13-9=4

20-5=15

19-10=9

Recommended for children from seven years

Integer Examples

3+5=8

42+14=56

66-11=55

96-46=50

20-13+5=12

9-(10-3)=2

Step-by-step Tasks

10+10=20

1+9=10

9+0=9

22+2=24

13+7=20

4+11=15

10+15=25

16-15=1

15+11=26

14+16=30

7+0=7

8-6=2

5-1=4

18-12=6

10-3=7

14-4=10

7-5=2

26-16=10

16-7=9

19-9=10

1×6=6

9×2=18

2×7=14

5÷1=5

Comparisons

Natural 1.1 ip

5 < 6

Natural 2.1 ip

4+0 < 5-0

Language Exercises

Russian Vocabulary 1.1

учебн к

Recommended for children from eight years

Integer Examples

1+11=12

238+42=280

775-5=770

990-50=940

0+1+77=78

6+(2+7)=15

3×0=0

90÷2=45

8×7=56

45+27=72

72-28=44

73-51=22

Step-by-step Tasks

29+1=30

16-10=6

8+13=21

19+13=32

50+30=80

14+16=30

7+2+1=10

19-18=1

20-12=8

20-9=11

11-7=4

39-29=10

50-10=40

3×1=3

10×2=20

4×7=28

4×7=28

10×5=50

7×2=14

10×5=50

10×6=60

9×6=54

8×7=56

9×6=54

6×10=60

0×8=0

8×10=80

4×9=36

6×3=18

10×2=20

10×2=20

10÷2=5

7÷1=7

3÷3=1

2÷1=2

24÷4=6

8÷1=8

0÷5=0

0÷5=0

10÷2=5

48÷6=8

48÷6=8

21÷7=3

24÷6=4

70÷7=10

80÷8=10

60÷6=10

63÷9=7

72÷8=9

30÷3=10

100÷10=10

Comparisons

7-4 > 1+0

96 > 92

70-30 < 87-30

9×1 > 2×3

Equations

Linear 1.1 ip

x+5=6

Linear 2.1 ip

x×2=10

Language Exercises

Russian Vocabulary 1.2

астр навт

Russian Vocabulary 2.1

к пуста

Russian Vocabulary 3.1

наш л

English Vocabulary 1.1

English Vocabulary 2.1

Lexicon 1.1

o e [single]

Lexicon 2.1

pl yer [gambler]

Recommended for children from nine years

Integer Examples

79-49=30

220+448-18=650

98+(88-86)=100

6÷2=3

2×245=490

568÷8=71

99÷33=3

6×3×3=54

8÷(4÷2)=4

8÷2×(4÷2)=8

39÷10=3(9)

5899+1801=7700

7000-6446=554

7500+391=7891

87×9=783

40÷2=20

55+3×10=85

48×2-44÷4=85

64÷4=16

41÷6=6(5)

Step-by-step Tasks

2×23=46

4×11=44

3×17=51

15×3=45

19×4=76

15×5=75

12×1=12

2×31=62

8×5=40

6×18=108

14×7=98

5×6=30

17×8=136

2×33=66

11×9=99

6×14=84

7×15=105

20×8=160

7×8=56

14÷2=7

88÷11=8

0÷3=0

60÷3=20

76÷4=19

85÷5=17

40÷2=20

21÷3=7

60÷30=2

18÷6=3

21÷7=3

140÷7=20

160÷8=20

125÷5=25

90÷9=10

32÷8=4

490÷10=49

108÷9=12

12÷4=3

Comparisons

70 > 2

491 > 466

978-169 > 283-263

8×6 < 100÷2

Equations

Linear 1.2 ip

x-40=20

Linear 2.2 ip

3×x=72

Linear 3.1 ip

3×x-3=6

Language Exercises

Russian Vocabulary 1.3

геогра

Russian Vocabulary 2.2

экспр сс

Russian Vocabulary 3.2

б лет

English Vocabulary 3.1

z ro

10+

Recommended for children from ten years

Integer Examples

764-(85+224)=455

82493+27507=110000

965550-473876=491674

174686+125314=300000

343+(116+200)=659

5×(6×10)=300

26×27=702

1026÷6=171

52×81=4212

90÷2×9=405

256÷(8÷2)=64

800÷2÷(5×8)=10

26÷4=6(2)

157000+281637=438637

503251-320000=183251

335048-259942=75106

168×7=1176

2541×86=218526

938÷2=469

64-4×12=16

137×3+376=787

30×13-420÷7=330

(29-26)×(10+6)=48

810÷9=90

132÷7=18(6)

Comparisons

Natural 0.3 ip

744÷8 > 5×3

Natural 1.4 ip

881070 < 934275

Natural 2.4 ip

895326+79974 > 602031-124272

Natural 3.3 ip

528÷6 < 16×10

Equations

x-4=6

x-507=148

44×x=836

5×x+40=90

5×(9-x)=10

Rounding

Round 1.1 ip

802≈80

Round 1.2 ip

1282≈13

Round 2.1 ip

256+245≈50

Language Exercises

Russian Vocabulary 2.3

микр фон

English Vocabulary 1.2

m ybe

English Vocabulary 2.2

lat st

Lexicon 1.2

s fely [securely]

Lexicon 2.2

l ss [privation]

Infinitive 1.1

outride outridden [outride]

11+

Recommended for children from the age of eleven

Integer Examples

Beginner 0.5 ip

259242+(953998-698000)=515240

Beginner 4.5 ip

61973+838027-83493=816507

Beginner 5.5 ip

517108+(102556+80200)=699864

-1+4=3

-670307-6323=-676630

-1-0-9=-10

(72÷18)×14=56

400÷50×1250=10000

(450÷5)÷2=45

5×(3×13)×26=5070

911÷30=30(11)

4600×500=2300000

1479÷29=51

(810-270)÷(305-302)=180

Numeracy 0.3 ip

7600-10×500=2600

Numeracy 1.3 ip

6400-40×55=4200

Numeracy 2.3 ip

9357-1200÷600×1219=6919

Numeracy 3.2 ip

66+(13+19)×2=130

Numeracy 3.3 ip

(8915-4055)÷(84+78)=30

Divisor_ENG 1.3 ip

6000÷20=300

Remainder_ENG 1.3 ip

56÷2=28

Decimal Examples

3.1+(6.3+0.2)=9.6

67.7-6.1-41.9=19.7

3.6-0.6=3

94.7-8.3=86.4

9.6-6.8+5.2=8

15.2+50+4=69.2

8.9-(2.8+5.1)=1

12.2+(39+3.6)=54.8

15.4÷7=2.2

6×6.6=39.6

7.2÷1.8=4

2.3×3=6.9

Divisional_ENG 1.1 dp

19÷0.4=47.5

Fraction Examples

Numerator 1.1 fp

7/9+1/9=8/9

Comparisons

Natural 0.4 ip

416595 < 610000

Natural 3.4 ip

119800÷100 < 403155÷9

6 > -1

-2 < 7

-2-6 > -4-5

-2×(-2) > 9÷3

10 < 23.4

42+3 > 80.8-35.9

1/5 < 3/4

361/37 = 361/37

9/10-1/10 > 1/4+1/4

Equations

(17+x)×2=40

390-x=0

180-720÷x=0

(15+x)×2=30

312÷(x-660)=52

3-x=-3

-x×(-9)=-9

Rounding

48.1≈48

73.2-9.5≈64

9×101≈91

9002≈90

147857≈148

173856≈174

1752+3651≈54

659654+74041≈734

410÷5≈8

8394÷3≈28

75209×6≈451

Language Exercises

Russian Vocabulary 1.4

экспл атация

Russian Vocabulary 3.3

исч зать

English Vocabulary 1.3

r bbish

English Vocabulary 2.3

ab ence

English Vocabulary 3.2

alo e

Lexicon 1.3

fo rteenth [count]

Infinitive 2.1

backslide [backslide]

12+

Recommended for children from the age of twelve

Integer Examples

-(1-10)+(4-10)=3

-(1-0)-(1-7)=5

-48-(-43-79)=74

-19+2=-17

20-42=-22

-2+9+10=17

-36+82+18=64

-3-(9-2)=-10

3+(-15+9)=-3

7-(-30+12)=25

-(0+0)+(4-3)=1

(19+3)-(3+4)=15

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

505×408=206040

550×456=250800

340000÷200=1700

780000÷240=3250

32×15×327=156960

5600÷(224÷8)=200

192500÷(100÷2)÷110=35

5470×2657=14533790

29750÷17=1750

-45÷5-51=-60

-2×4+27=19

7×10+72÷9=78

-60+20÷(17-15)=-50

-4×3×(14÷2)=-84

-7×8=-56

12÷4×(-2)=-6

(-40÷2)÷2=-10

24×(-4)÷(-2×(-2))=-24

Divisor_ENG 1.4 ip

27246÷19=1434

Decimal Examples

40-28.35+35.35=47

11.58+84.27=95.85

75-48-27=0

83+(36.35-19.39)=99.96

-2.8-5+7.1=-0.7

42+40.5=82.5

-2.9+3.1=0.2

-3-19.1=-22.1

5.3+5.3-1.6=9

0.3-88.7+77.4=-11

2.9-(-1.8+3)=1.7

-40.3-(8.8+4)=-53.1

27÷5=5.4

0.51÷3=0.17

(36÷22.5)÷2=0.8

0.64×20=12.8

1.54÷0.56=2.75

0.5×0.52=0.26

9.8×0.5÷0.1=49

8.8÷(72÷9)=1.1

6×(66.9-51.8)÷6=15.1

2×0.4+41.5=42.3

51.7+4×0.2×2.5=53.7

19.8÷(3.4+5.6)÷22=0.1

Negatory 1.1 dn

-18÷1.8-23=-33

Negatory 2.1 dn

0.5×12-1.7÷3.4=5.5

Residual_ENG 1.1 dp

46÷10=4.6

Divisional_ENG 1.2 dp

1.28÷4=0.32

Fraction Examples

Numerator 0.1 fp

9/10-(1/10+1/10)=7/10

Numerator 0.2 fp

6/23+2/23+436/69=20/3

5/7+169/28=27/4

7/8-3/8-1/2=0/1

7/16+1/16+29/10=17/5

2/9+(1/3-1/3)=2/9

107/24-(9/14+139/56)=4/3

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

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

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

1/6-(-1/2-1/6)=5/6

9/2÷21/4=6/7

2/5÷1/5=2/1

46/5÷23/5×34/9=68/9

136/24=17/3

1200/50=24/1

5/6÷15/2+1/3=4/9

Comparisons

-30+60 > -30+40

-22×(-3) = 11×6

-10 > -45

-520 < 700

-4+57 > 24+13

58+42 > -70-664

2×8 = -48÷(-3)

-640÷(-16) < 666÷2

0.5×8 = 27.2÷6.8

34.13+15.87 < 19.71+53.11

81.89 > 51.14

65.799 < 77.263

613.151 > 449.867

81.45-18.25 > 1.87+0.35

Point 2.3 dp

83.011-3.011 > 85.057-20.761

98.4÷8.2 < 37÷2

3.6÷2 < 1.44×60

-53.9-15.1 < 50.3+12

-16.83-80.19 < 47.97-3.33

-21.5 < 16

13 > -0.47

35.1-5 < 15.9+46.8

93.12-5.13 > -0.52-20.72

Doted 3.1 dn

77.5÷(-15.5) = 33÷(-6.6)

Doted 3.2 dn

2.5×3 < -15×(-2.3)

Improper 0.1 fp

5/9×3/10 < 3/4÷9/10

Improper 0.2 fp

7/10×60/7 > 2/5×45/16

Improper 1.3 fp

2616/43 > 411/11

Improper 2.2 fp

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

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

13/3÷49/12 < 1/2÷1/19

Descent 1.1 fn

-4/7 < -1/2

Descent 1.2 fn

-293/33 < -49/55

Descent 2.1 fn

1/1-4/5 < 1/2-1/6

Equations

3×(-x-8)=0

-15×(-x)=60

x+98=44

114-x=-4

2×x=-94

x÷3=-291

-10+x×2=10

-4+x÷20=0

3÷(-x+9)=-3

45÷(-83-x)=-15

Rounding

4.5≈5

21.52≈21.5

83.78≈83.8

17.177≈17.18

66.14+6.07≈72.2

99.255-49.624≈49.63

37.7÷42.9≈1

49÷67.97≈0.7

Language Exercises

Russian Vocabulary 2.4

инц дент

English Vocabulary 3.3

mal

Lexicon 2.3

fa rly [quite]

Infinitive 1.2

let let [let]

Infinitive 3.1

lay [lay]

13+

Recommended for adolescents from the age of thirteen

Integer Examples

Conversant 0.4 in

-875-(-494+440)=-821

Conversant 0.5 in

-207188-449552=-656740

Conversant 1.4 in

151-465=-314

Conversant 2.4 in

310-770+758=298

Conversant 2.5 in

585739-550000-639234=-603495

Conversant 3.4 in

-229-(346+83)=-658

Conversant 3.5 in

521004+(-874424+243978)=-109442

Conversant 4.4 in

(0-479)+(929-218)=232

Conversant 4.5 in

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

6938712÷396=17522

-133-4×9×23=-961

503-300÷100=500

-140+5×8×23=780

(-30-11)×(-8-7)=615

91÷(-7)=-13

-10×20=-200

-36×(-2)×9=648

(-168÷(-6))÷(-4)=-7

-900÷3÷(-5×5)=12

256119÷177=1447

Decimal Examples

Partitive 0.4 dp

78.4+(378.278+125.791)=582.469

Partitive 1.4 dp

399.582+9.241=408.823

Partitive 2.4 dp

9.226+380-334.3=54.926

Partitive 3.4 dp

537.051-(295.368-167.605)=409.288

Split 0.3 dn

-12-28=-40

Split 0.4 dn

-544.409+274.409=-270

78.85-64.55=14.3

161.045-911.045=-750

59.44+16.07-80=-4.49

401.855+140.627-592.507=-50.025

Split 3.3 dn

62.85+(-56.6+55.19)=61.44

Split 3.4 dn

-363.02-(-32.623-543.28)=212.883

76÷8=9.5

16.192÷0.352=46

9.6×0.5×12.5=60

18×0.12=2.16

1.28×3.125=4

24.48÷3.2=7.65

79.596÷4.752=16.75

0.8×0.75÷30=0.02

27.36÷43.776×52=32.5

1.2÷(15×2)=0.04

0.022×(62.5×0.032)=0.044

Definition 0.2 dp

2.16×45-15.01=82.19

Definition 1.2 dp

2.5÷31.25+11.34=11.42

Definition 1.3 dp

1.6÷12.5+83.242=83.37

Definition 2.2 dp

0.77×15+56.25×0.16=20.55

Definition 2.3 dp

19.344+5.76÷48+25.693=45.157

3×(3.72+3.55)÷3=7.27

11+28.5×1.2+2.8=48

-80÷31.25-23=-25.56

30.4-8.16÷0.4=10

38.042+0.54×52=66.122

Negatory 2.2 dn

82.2-0.65×0.2+7.99=90.06

Negatory 2.3 dn

7.501+32×0.024×1.25=8.461

Negatory 3.1 dn

(16.5-16)×(6.5+1.9)=4.2

Negatory 3.2 dn

96.9÷(-0.74-1.81)÷50=-0.76

Residual_ENG 1.2 dp

12÷15=0.8

Divisional_ENG 1.3 dp

9÷3.125=2.88

Fraction Examples

Numerator 0.3 fp

3/11+8403/869=8640/869

Numerator 1.3 fp

3782/351+9647/351=1033/27

Numerator 2.3 fp

21/10+549/10-5991/488=21825/488

Numerator 3.3 fp

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

Denominator 0.2 fn

-15/4+27/8+5/8=1/4

Denominator 1.2 fn

7/3+85/33=54/11

Denominator 1.3 fn

2440/27-15488/729=50392/729

Denominator 2.2 fn

5/62+49/62+159/31=6/1

Denominator 3.2 fn

-23/35+(-338/35+38/5)=-19/7

2/3×1/4=1/6

1/10×20/3÷4/3=1/2

1/5×408/5=408/25

12/5×1/3×173/4=173/5

3/5÷3/17×470/17=94/1

(20/3÷10/7)×3/2=7/1

189/40÷(21/13÷7/39)=21/40

184/23=8/1

1/6+2/3×1/8=1/4

8/9÷1/41-67/9=29/1

(19/2-7/2)×3/2=9/1

(1/4+11/4)÷3/10=10/1

-48/5+1/4÷5/2=-19/2

-7/8×1308/49+473/21=-5/6

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

-815196 < 17890

Ceil 2.4 in

-155769-529973 < 78000+610140

Ceil 3.4 in

-10×(-3) < -693000÷(-9)

Point 0.3 dp

2.932+11.334 < 95.547-81.263

Point 0.4 dp

388.994 < 795.415

Point 2.4 dp

11.339+474.876 > 111.143+83.948

Point 3.3 dp

1.5×1.2 < 0.912×41.25

Point 3.4 dp

5.61×115.2 > 780÷13

Doted 0.3 dn

43.316÷(-1.547) > -5.1×16.8

Doted 1.3 dn

-34 < 44.387

Doted 1.4 dn

546.477 < 635.778

Doted 2.3 dn

-96.779+51.333 < 2.149+43.295

Doted 2.4 dn

48.789+522.414 > -118.102-318.831

Doted 3.3 dn

-6.075×1.36 < 49.458÷(-6)

Improper 0.3 fp

8/1 < 95/1

Improper 3.3 fp

1/2×180/607 < 633/25÷211/695

Descent 0.1 fn

1/5 > -1/2

Descent 0.2 fn

-1/62-411/62 < 9/2-37/8

Descent 1.3 fn

33461/449 > 23705/449

Descent 2.2 fn

5/1-284/65 > -1/3-1/15

Descent 3.1 fn

1/3×(-2/3) < 3/5×5/9

Descent 3.2 fn

-700/99×(-88/75) > -6/1×(-43/34)

Equations

x-4=26

29×x+848=-892

-(-x-855)×40=-880

y-x=1

Rounding

Rounding 0.3 dp

67.76÷29.683≈2.28

Rounding 3.3 dp

57.057÷91.112≈0.63

Language Exercises

Russian Vocabulary 1.5

хл стать

Russian Vocabulary 3.4

вн запно

English Vocabulary 1.4

pur hase

English Vocabulary 2.4

i pression

Lexicon 1.4

caref l [anxious]

Infinitive 2.2

sowed [sow]

14+

Recommended for adolescents from the age of fourteen

Integer Examples

Intellect 0.3 in

-3528÷49+30×1167=34938

Intellect 1.3 in

-151×82-927=-13309

Intellect 2.3 in

-1800-81×20-1980=-5400

Intellect 3.3 in

(8372+1628)÷(-18-7)=-400

25×(-19)=-475

-83×80=-6640

54×15×(-6)=-4860

2394÷(-3×(-2))=399

21×(-30×4)÷(-24)=105

Decimal Examples

100÷16=6.25

102.6÷0.8=128.25

8.1×27.2=220.32

6.24÷0.6=10.4

2.4×12.09=29.016

1.7×64÷68=1.6

(680÷62.5)×8.925=97.104

Definition 0.3 dp

(69.775-68.345)×(5.364+6.536)=17.017

Definition 0.4 dp

5.28÷20.625+161.28÷184.32=1.131

Definition 1.4 dp

38×14.4-122.13=425.07

Definition 2.4 dp

100.74+1.035×790÷1.15=811.74

Definition 3.3 dp

42.754+(53.933-51.133)×1.8=47.794

Definition 3.4 dp

312.5÷(13.407+36.593)×80=500

Negatory 0.3 dn

-87.084+16.416÷72÷5.7=-87.044

Negatory 0.4 dn

-158.08+3.6×107.8=230

Negatory 1.4 dn

-380.53+405×0.026=-370

Negatory 2.4 dn

699.334-547.2÷4.56×1.829=479.854

Negatory 3.3 dn

9.3×(0.614+9.386)÷4=23.25

Negatory 3.4 dn

3.85×(970-967)×0.16=1.848

Residual_ENG 1.3 dp

11÷88=0.125

Fraction Examples

Denominator 0.3 fn

-29553/974+(8/13+928/13)=40575/974

Denominator 2.3 fn

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

Denominator 3.3 fn

-1/4-(1/12+1/15)=-2/5

Fragment 0.3 fp

3/4÷3/10÷5/94=47/1

Fragment 3.3 fp

38/5×(289/7÷578/7)=19/5

Limited 0.2 fp

3/4×16/57+11/19=15/19

Limited 1.3 fp

54145/724-3/4×2701/543=12861/181

Limited 2.2 fp

(1/5+3/85)×629/98=74/49

Complete 0.2 fn

-29/80-18/19÷2/95=-3629/80

Complete 1.3 fn

100/7-1/3÷7/993=-33/1

Complete 2.2 fn

392/61÷(173/8+219/8)=8/61

Comparisons

Doted 0.4 dn

-608.316+220 > -290-98.323

Doted 3.4 dn

-343.387÷20.14 < 44.33÷2.6

Descent 0.3 fn

160/349+6/349 > 50/1-645/13

Descent 2.3 fn

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

Descent 3.3 fn

-95/192×156/95 < 1/14÷(-1/7)

Equations

4x²+8x=0

5x²=405

x²+5x=0

x²-8x+12=0

80y÷10x=8

y-x=5

720x÷3y=800

9y+5x=140

3y+6x=-30

y+x=6

2x×13y=390

-10y+4x=-60

Language Exercises

Russian Vocabulary 2.5

впр тык

English Vocabulary 1.5

suffi iently

English Vocabulary 2.5

a knowledge

English Vocabulary 3.4

compl te

Lexicon 1.5

desp rately [badly]

Lexicon 2.4

fort eth [count]

Infinitive 1.3

underspend underspent [underspend]

Infinitive 3.2

bend [bend]

15+

Recommended for adolescents from the age of fifteen

Integer Examples

Logics 0.4 in

-19×26÷(4199÷(-221))=26

106964÷(-13)=-8228

20×160÷(-400)=-8

24×(354×62)=526752

-100×(10×10)×94=-940000

Fraction Examples

Limited 0.3 fp

62/221×65/496+13/24=59/102

Limited 2.3 fp

(211/650+359/650)×134/285=134/325

Complete 0.3 fn

-85/508-1/2÷2/3=-233/254

Complete 2.3 fn

(-17/38-1/6)×11553/140=-3851/76

Equations

-8x²-8x+48=0

42x²=9450

35x²+2835x=0

x²-56x+559=0

x+y=150

x+y=760

60y÷x=6

20x-45y=880

7x-2y=-234

-y+x=-10

-4x×15y=-53760

-55y+20x=-3270

Language Exercises

Russian Vocabulary 3.5

масл ница

English Vocabulary 3.5

fore gn

Lexicon 2.5

c mmitment [obligation]

Infinitive 2.3

spit [spit]

16+

Recommended for adolescents from the age of fifteen

Equations

-5x²-520x-2475=0

14x²=201600

106x²+52788x=0

4x²-440x-16800=0

132x×6y=506880

10y×3x=614400

88x+92y=165040

x+y=-30

y+x=1691

6x×3y=-8550000

239y-9x=-98470

Language Exercises

Infinitive 3.3

send [send]

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