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

6+1=7

Beginner 2.1 ip

7-6=1

Beginner 3.1 ip

8-1=7

Step-by-step Tasks

3+2=5

1+3=4

1+2=3

2+3=5

1+9=10

4-1=3

5-2=3

7-1=6

1-1=0

6-2=4

7-3=4

Recommended for children from six years

Integer Examples

6+11=17

11-5=6

11-0=11

3+5-4=4

Step-by-step Tasks

2+7=9

3+9=12

5+3=8

4+8=12

0-0=0

4+5=9

7+5=12

6+7=13

3+7=10

2+7=9

8+7=15

4+2=6

8+9=17

9+8=17

5-4=1

6+10=16

5+8=13

10-4=6

9-5=4

11-2=9

14-1=13

15-4=11

10-6=4

12-7=5

10-5=5

16-8=8

10-8=2

16-9=7

0-0=0

19-10=9

Recommended for children from seven years

Integer Examples

1+4+5=10

69+22=91

91-63=28

49-29=20

18-1-5=12

8-(8-5)=5

Step-by-step Tasks

10+8=18

13+2=15

9+0=9

11+2=13

13+23=36

14+11=25

10+15=25

18-15=3

0+25=25

6+11=17

27+3=30

17-6=11

21-1=20

12-2=10

19-13=6

24-4=20

6-5=1

18-6=12

27-17=10

20-20=0

9×1=9

1×2=2

0×1=0

4÷1=4

Comparisons

Natural 1.1 ip

1 < 5

Natural 2.1 ip

1+0 < 2+6

Language Exercises

Russian Vocabulary 1.1

Апрел

Recommended for children from eight years

Integer Examples

1+11=12

199+19=218

504-109=395

749-181=568

0+1+77=78

4+(14-8)=10

4×18=72

91÷13=7

3×3=9

32+48=80

57-26=31

10+76=86

Step-by-step Tasks

24+6=30

29+6=35

18+0=18

21+19=40

30+60=90

39+11=50

7+0+10=17

19-18=1

20-12=8

26-9=17

3-0=3

20-0=20

100-70=30

3×9=27

2×1=2

4×9=36

4×7=28

1×5=5

7×5=35

10×5=50

6×2=12

4×1=4

7×8=56

1×6=6

5×4=20

8×6=48

1×5=5

9×1=9

6×3=18

5×4=20

10×4=40

16÷2=8

6÷2=3

27÷3=9

18÷2=9

0÷4=0

8÷1=8

30÷5=6

0÷5=0

10÷2=5

42÷6=7

48÷6=8

21÷7=3

36÷4=9

15÷3=5

32÷8=4

24÷8=3

72÷9=8

45÷5=9

90÷9=10

10÷10=1

Comparisons

10 > 4

31 > 18

50-35 < 10+55

8÷2 < 7÷1

Equations

Linear 1.1 ip

3+x=10

Linear 2.1 ip

2÷x=2

Language Exercises

Russian Vocabulary 1.2

н рочно

Russian Vocabulary 2.1

искусн

Russian Vocabulary 3.1

к бина

English Vocabulary 1.1

j y

English Vocabulary 2.1

t xt

Lexicon 1.1

z ro [naught]

Lexicon 2.1

ar a [sphere]

Recommended for children from nine years

Integer Examples

90-90=0

9+11+111=131

82-(48-36)=70

20÷2×(3×2)=60

28×19=532

12÷6=2

9×50=450

5×2×8=80

(4×20)÷2=40

4÷2×(10×4)=80

60÷9=6(6)

5811+3090=8901

6531-2831=3700

8747-4847=3900

31×7=217

72÷2=36

46×3-90=48

40+3×3+47=96

18÷6=3

48÷5=9(3)

Step-by-step Tasks

2×21=42

11×2=22

3×11=33

15×3=45

4×13=52

15×5=75

12×3=36

20×5=100

3×20=60

6×16=96

12×7=84

7×15=105

17×8=136

16×5=80

12×9=108

19×9=171

10×16=160

20×8=160

19×8=152

8÷2=4

22÷11=2

18÷3=6

30÷3=10

80÷4=20

45÷5=9

24÷2=12

36÷2=18

60÷30=2

18÷6=3

119÷7=17

72÷4=18

88÷8=11

15÷5=3

45÷9=5

35÷7=5

320÷10=32

108÷9=12

12÷4=3

Comparisons

56-35 > 10+4

852 > 850

993-373 < 919-183

100÷50 < 3×26

Equations

Linear 1.2 ip

94-x=14

Linear 2.2 ip

3×x=72

Linear 3.1 ip

2+x×7=9

Language Exercises

Russian Vocabulary 1.3

б гроветь

Russian Vocabulary 2.2

ж лтеть

Russian Vocabulary 3.2

д ревня

English Vocabulary 3.1

gr y

10+

Recommended for children from ten years

Integer Examples

254+623=877

141211+55934=197145

791251-82566=708685

174686+125314=300000

93+(937-95)=935

4×9×5=180

100×70=7000

6888÷3=2296

33×21=693

400÷4÷2=50

40×(2×2)=160

39÷13×(25×2)=150

26÷4=6(2)

242327+357673=600000

395396-182878=212518

314000+235759=549759

6615×2=13230

1900×26=49400

156÷3=52

64-4×12=16

687-6×102=75

124+92÷23+422=550

(37+23)÷(58-48)=6

504÷9=56

28÷4=7

Comparisons

Natural 0.3 ip

3×17 > 780÷20

Natural 1.4 ip

151770 < 829427

Natural 2.4 ip

900508-5407 > 439545-227813

Natural 3.3 ip

360÷9 = 560÷14

Equations

3×(10-x)=6

x-250=240

330÷x=33

2×x-43=37

(x-1)×5=10

Rounding

Round 1.1 ip

181≈18

Round 1.2 ip

6039≈60

Round 2.1 ip

917-215≈70

Language Exercises

Russian Vocabulary 2.3

п недельник

English Vocabulary 1.2

t lk

English Vocabulary 2.2

mu t

Lexicon 1.2

s fely [securely]

Lexicon 2.2

l kely [probably]

Infinitive 1.1

undergo undergone [undergo]

11+

Recommended for children from the age of eleven

Integer Examples

Beginner 0.5 ip

452220-(652958-560738)=360000

Beginner 4.5 ip

957089-7288-549801=400000

Beginner 5.5 ip

956690-(928328-12477)=40839

Conversant 1.1 in

0-8=-8

Conversant 1.5 in

-770000+924199=154199

-6+10-1=3

2×1250=2500

50×6÷5=60

120÷(15÷3)=24

126÷(9÷3)×37=1554

76÷38=2

8118×869=7054542

1200÷10=120

137×2+60÷2=304

541+12×12+15=700

7000÷350+7117=7137

3659-34×20+1204=4183

220-912÷(2+74)=208

(598-570)×(21+22)=1204

Divisor_ENG 1.3 ip

6000÷20=300

Remainder_ENG 1.3 ip

300÷78=3(66)

Decimal Examples

2.5+8-3=7.5

49.5-(11.9+33.2)=4.4

8.4-3.9=4.5

63.9-37.9=26

9.7-7.8+6.1=8

17.4+2+58.6=78

1.2+(0.9+5)=7.1

65.9-(42.6-2)=25.3

0.5÷1=0.5

7×3.6=25.2

39.6÷0.8=49.5

3.6×4=14.4

Divisional_ENG 1.1 dp

1.8÷3=0.6

Fraction Examples

Numerator 1.1 fp

1/6+1/2=2/3

Comparisons

12×200 < 330981÷7

499904÷214 > 3×64

7 > -2

-8 < 6

-2-6 > -4-5

-2×3 > 4×(-2)

73 > 64.9

98.1-22.4 < 84.4-5.9

7/10 > 2/3

81/23 > 38/69

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

Equations

58-x=28

352÷(5+x)=32

30+x÷65=41

(19+x)×4=76

(x+4)×40=960

-2+x=8

x÷(-7)=-1

Rounding

45.6≈46

48.8+1.1≈50

9×101≈91

9379-1047≈83

535855≈536

844542≈845

9109+131≈92

220000+66769≈287

410÷5≈8

1117×5≈56

153401×3≈460

Language Exercises

Russian Vocabulary 1.4

игн рировать

Russian Vocabulary 3.3

сост заться

English Vocabulary 1.3

th rteen

English Vocabulary 2.3

creat re

English Vocabulary 3.2

s ek

Lexicon 1.3

tr ding [commerce]

Infinitive 2.1

mislay [mislay]

12+

Recommended for children from the age of twelve

Integer Examples

-3-8+10=-1

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

-30+(-93+73)=-50

-12+12=0

-45-23=-68

-9-7+0=-16

37-87+70=20

-2-(1+4)=-7

4-(-11+12)=3

-7-(38+22)=-67

-(0+5)-(7-4)=-8

(16-18)+(3-20)=-19

(87-29)-(29+70)=-41

220800÷1104=200

350×140=49000

270000÷750=360

849×664=563736

222000÷5÷6=7400

(250000÷5)÷250=200

109×(336÷8)÷14=327

51004×1300=66305200

2400÷24=100

-17-(10+9)÷19=-18

16×3-90=-42

-20-7×8+23=-53

(25+5)÷(64-59)=6

-6×(-3)×5=90

-50÷5=-10

48÷4÷(-3)=-4

(-80÷2)÷(-4)=10

80÷2÷(-2×2)=-10

65961÷21=3141

Decimal Examples

Partitive 0.3 dp

1.18+13.67+21.89=36.74

Partitive 1.3 dp

1.07+25=26.07

Partitive 2.3 dp

0.88+53.43+11.69=66

Partitive 3.3 dp

81.49+(73-57.47)=97.02

Split 0.1 dn

3.8+1.1=4.9

Split 0.2 dn

-14.3+(55.7-63.9)=-22.5

-2.9+3.1=0.2

33.7-5.7=28

-4+6.8-4.8=-2

8.9+52.4-52.3=9

-3.7-(6.9-8.6)=-2

18+(-31.6+50.5)=36.9

27÷2=13.5

2.86÷0.13=22

1.6×0.5×40=32

1.92×32.5=62.4

16.8÷2.4=7

5.6×0.05=0.28

10.5×6×0.4=25.2

(10÷0.8)÷2.5=5

36÷4.8+0.6×20=19.5

27÷1.5-16.9=1.1

68.7-1.2÷2.4×96=20.7

62.6÷(4.8-2.8)÷62.6=0.5

Negatory 1.1 dn

-10.2-15.6÷2.4=-16.7

Negatory 2.1 dn

-12×0.3+1.6÷0.8=-1.6

Residual_ENG 1.1 dp

69÷2=34.5

Divisional_ENG 1.2 dp

45.24÷3.77=12

Fraction Examples

Numerator 0.1 fp

4/5-(1/4+1/4)=3/10

Numerator 0.2 fp

29/5-(59/30-13/18)=41/9

Numerator 1.2 fp

2/3+307/75=119/25

Numerator 2.1 fp

7/9-1/9-4/9=2/9

Numerator 2.2 fp

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

Numerator 3.1 fp

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

Numerator 3.2 fp

2/3+(25/3-13/20)=167/20

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

7/10-1/10=3/5

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

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

3/4×44/9=11/3

7/11×121/7=11/1

1/3×3/2×25/3=25/6

126/45=14/5

24/72=1/3

2/3×7/6+32/9=13/3

Comparisons

82 > -20

-735 < 706

59 = 59

678 > -681

60-2 > 82-90

-44+961 > 8+2

-12×(-3) > 68÷(-2)

-84×(-9) > 150×3

4+68.6 < 84.9-12.1

31-30 < 86.89-63.35

2.65 < 5.67

78.106 > 10.016

811.262 > 811.242

98.73-1.14 > 7.39+0.53

Point 2.3 dp

5.3+28.228 > 15.373+8.373

3×0.9 < 0.5×15

28×1.8 > 18.36÷2

-53.9-15.1 < 50.3+12

-66.38+4.06 < 48.74-8.78

28.1 < 33.6

76.46 < 97.17

4.7+6.4 < 21.4+27.6

-33.13-16.15 < -17.65-31.62

6×(-2.8) < -1.2×12.5

-1.05×8.8 > -2×4.63

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

6/47+14/47 = 667/94-627/94

Improper 1.3 fp

92/397 < 8/11

Improper 2.2 fp

1/2+1/20 < 1/3+1/3

Improper 2.3 fp

257/3-4543/303 > 22909/808-20613/808

Improper 3.1 fp

4/5×5/6 = 1/3÷1/2

Improper 3.2 fp

1/6×120/59 < 1/2×20/11

Descent 1.1 fn

1/6 > 1/10

Descent 1.2 fn

12/13 > 1/2

Descent 2.1 fn

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

Equations

x+10=6

x×2+68=-10

3+x=0

-x+157=-163

x÷61=-1

x÷3=-291

x÷3+1=0

x÷10+1=-1

(-x+6)×3=9

-6×(-72+x)=72

Rounding

10.4×3≈31

37.12+36.15≈73.3

81.38≈81.4

61.596≈61.6

56.95-34.17≈22.8

94.006-31.514≈62.49

21.5×1.5≈32

49÷67.97≈0.7

Language Exercises

Russian Vocabulary 2.4

бр дячий

English Vocabulary 3.3

pi l

Lexicon 2.3

attac [join]

Infinitive 1.2

waylay waylaid [waylay]

Infinitive 3.1

see [see]

13+

Recommended for adolescents from the age of thirteen

Integer Examples

Conversant 0.4 in

-(2+338)+(202-832)=-970

828000-168565=659435

-110-610=-720

-413+822-641=-232

232056+913665-686147=459574

Conversant 3.4 in

806+(-803-181)=-178

Conversant 3.5 in

583000-(856644-390000)=116356

Conversant 4.4 in

(530-357)-(750+291)=-868

Conversant 4.5 in

-(100000+90000)-(249388-209388)=-230000

Divisor 1.5 ip

19600÷196=100

Intellect 0.2 in

-706+918÷(28+26)=-689

Intellect 1.2 in

-262×5+360=-950

Intellect 2.2 in

430-960÷80+189=607

Intellect 3.2 in

165+(474-114)÷180=167

-210÷(6÷(-3))=105

-10×20=-200

-20×25÷2=-250

-4×(5×5)=-100

-720÷(-36÷3)÷15=4

9852759÷567=17377

Decimal Examples

Partitive 0.4 dp

599.447-549.447=50

Partitive 1.4 dp

589.082-100=489.082

Partitive 2.4 dp

399.054-63.768+347.714=683

Partitive 3.4 dp

423.627+(374.827-30)=768.454

21-21.29-73.7=-73.99

-71-489.921=-560.921

78.2+11.8=90

488.989+344.754=833.743

Split 2.3 dn

70.32+73.49-80.24=63.57

Split 2.4 dn

401.855+140.627-592.507=-50.025

Split 3.3 dn

62.85+(-56.6+55.19)=61.44

Split 3.4 dn

-396.158-(388.251-24.409)=-760

99÷12=8.25

0.013÷0.04=0.325

7.2÷15=0.48

18.81÷13.75=1.368

6.075×5.12=31.104

1.125÷3=0.375

1.1×0.04=0.044

4÷0.4×1.6=16

35.64÷88÷1.35=0.3

47.88÷(63.84÷3)=2.25

0.009×(2.56×3.125)=0.072

Definition 0.2 dp

52.92÷1.47-19=17

Definition 1.2 dp

50.4÷6.72-3.27=4.23

Definition 1.3 dp

98.091+18.63÷12.42=99.591

Definition 2.2 dp

2.32×37.5-2.56×18.75=39

Definition 2.3 dp

6×0.16+20×0.015=1.26

Definition 3.2 dp

(90-88.57)×(19.5+4.5)=34.32

11+28.5×1.2+2.8=48

-21.28+41.6÷1.25=12

-10.5×2-21.74=-42.74

54.72÷30-43.92=-42.096

Negatory 2.2 dn

8.75×0.64-5.7×8=-40

Negatory 2.3 dn

-4.788÷0.672+1.44÷22.5=-7.061

Negatory 3.1 dn

1.6÷(-0.5-1.1)÷2=-0.5

Negatory 3.2 dn

-2.61×(22.32+1.68)÷4=-15.66

Residual_ENG 1.2 dp

90÷5=18

Divisional_ENG 1.3 dp

1.32÷33=0.04

Fraction Examples

Numerator 0.3 fp

3903/187+6179/748+2840/153=1717/36

Numerator 1.3 fp

53/13+77/13=10/1

Numerator 2.3 fp

4/15+272/5+25334/645=20198/215

Numerator 3.3 fp

84037/891-(14552/891-13378/891)=93/1

1/6-13/6=-2/1

1/2+7/10=6/5

49/6+1049/90=892/45

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

Denominator 3.2 fn

71/95-(-1/5-269/38)=305/38

1/2÷3/4×9/7=6/7

44/3÷22/13÷13/2=4/3

304/9÷3154/81=72/83

2/3×59/2÷236/5=5/12

41/2÷123/4×45/2=15/1

(3/4×16/3)÷7/5=20/7

189/40÷(21/13÷7/39)=21/40

Reduction 1.3 fp

3552/5400=148/225

Limited 0.1 fp

5/4+1/3÷2/9=11/4

Limited 1.2 fp

18/19-18/19÷36/17=1/2

27/4÷(1/2+1/4)=9/1

-4/5-1/2×32/5=-4/1

3/4×50/9+5/2=20/3

5/7÷1/35-81/13=244/13

Complete 2.1 fn

(22/3-17/3)×12/5=4/1

Comparisons

Ceil 0.4 in

-910000 < 380600

Ceil 1.4 in

-809034 < 652031

Ceil 2.4 in

-410000-51370 > -287597-173825

Ceil 3.4 in

46×(-99) = -396198÷87

Point 0.3 dp

30.683 < 51.991

Point 0.4 dp

7.28×7.5 < 1.875×240

Point 2.4 dp

925.983-860.483 < 48.669+24.331

Point 3.3 dp

1.38×8.5 < 33.75×1.6

Point 3.4 dp

280.824÷4 < 561.664÷8

Doted 0.3 dn

-92+41 > -91.036+40.026

Doted 1.3 dn

11.471 > -11.454

Doted 1.4 dn

-339 < -338.998

Doted 2.3 dn

0.666+6.49 < 22.547-4.547

Doted 2.4 dn

78.618+44.684 < -3.756+583.756

Doted 3.3 dn

-65.04÷(-1.355) > 15×(-3.201)

Improper 0.3 fp

71/2+1417/116 < 3/4+643/10

Improper 3.3 fp

1/5×298/123 < 18673/410×295/142

Descent 0.1 fn

-3/5÷(-7/10) > 2/3×3/4

Descent 0.2 fn

-5/2+2/1 < 11/2-19/9

Descent 1.3 fn

53437/604 > -13406/151

Descent 2.2 fn

1/3+38/11 < -92/99+971/99

Descent 3.1 fn

-4/5×(-3/4) < -1/2÷(-3/4)

Descent 3.2 fn

-700/99×(-88/75) > -6/1×(-43/34)

Equations

32×(-x)=960

29×x+848=-892

-768÷(x+873)=-256

y+x=10

Rounding

Rounding 0.3 dp

0.561×76.391≈42.86

Rounding 3.3 dp

16×5≈80

Language Exercises

Russian Vocabulary 1.5

семант ка

Russian Vocabulary 3.4

мульт пликация

English Vocabulary 1.4

rema ning

English Vocabulary 2.4

i pression

Lexicon 1.4

motorc cle [moped]

Infinitive 2.2

swell [swell]

14+

Recommended for adolescents from the age of fourteen

Integer Examples

Intellect 0.3 in

-5067-264÷88=-5070

Intellect 1.3 in

-1326-40×60=-3726

Intellect 2.3 in

-4070+51842÷23÷49=-4024

Intellect 3.3 in

(1100+8980)÷(6142-5806)=30

-15×(-60)÷50=18

98÷49=2

5×20÷(-10)=-10

-32×(-25×(-5))=-4000

-221÷17×(6÷(-3))=26

Decimal Examples

24÷60=0.4

167.552÷152.32=1.1

40×0.001=0.04

0.506÷5.06=0.1

0.6×0.06=0.036

1.28×250×0.125=40

(6.25×48)÷19.2=15.625

Definition 0.3 dp

3.078÷1.35+5×7.168=38.12

Definition 0.4 dp

130.06÷(119.396-114.751)÷345.679=0.081

Definition 1.4 dp

262.198-1.25×80=162.198

Definition 2.4 dp

11.776÷256+212.8×0.035=7.494

Definition 3.3 dp

(0.807+0.153)÷(97-93.16)=0.25

Definition 3.4 dp

8.125×(2.256+1.512)÷13=2.355

Negatory 0.3 dn

-0.78×54+58.046=15.926

Negatory 0.4 dn

329-437.4÷0.6=-400

Negatory 1.4 dn

2.7×17.55-15.385=32

Negatory 2.4 dn

841.234-122.4÷9.375-988.178=-160

Negatory 3.3 dn

9.3×(0.614+9.386)÷4=23.25

Negatory 3.4 dn

253.724+(-560.692-271.308)÷32.5=228.124

Residual_ENG 1.3 dp

17÷40=0.425

Fraction Examples

Denominator 0.3 fn

-173/9-448/9=-69/1

Denominator 2.3 fn

-1/5-7/15-1671/22=-5057/66

Denominator 3.3 fn

12/5-(13/4-68/5)=51/4

Fragment 0.3 fp

57/2×20/19=30/1

Fragment 3.3 fp

38/5×(289/7÷578/7)=19/5

Limited 0.2 fp

1255/36-27/32×2104/81=233/18

Limited 1.3 fp

1/2÷9/118+247/9=34/1

Limited 2.2 fp

34/5÷(159/7-145/7)=17/5

Complete 0.2 fn

19/3÷(-5/9-10/63)=-133/15

Complete 1.3 fn

-6450/617+274/9×216/137=23166/617

Complete 2.2 fn

784/29÷(-19/2-79/2)=-16/29

Comparisons

Doted 0.4 dn

599.73÷30 > 578.772÷46

Doted 3.4 dn

-179.667÷(-9) < -18.75×(-1.408)

Descent 0.3 fn

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

Descent 2.3 fn

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

Descent 3.3 fn

25383/620÷8461/184 < -6071/110÷(-467/11)

Equations

x²+x-2=0

4x²=256

4x²-8x=0

3x²-3x-6=0

x+y=19

x+y=160

720x÷3y=800

8x-3y=42

y×15x=-300

-x-y=0

-144x÷4y=-108

-10y+10x=0

Language Exercises

Russian Vocabulary 2.5

ижд венчество

English Vocabulary 1.5

extra rdinary

English Vocabulary 2.5

d sappointed

English Vocabulary 3.4

compl te

Lexicon 1.5

ent usiasm [delight]

Lexicon 2.4

fort eth [count]

Infinitive 1.3

spread spread [spread]

Infinitive 3.2

sit [sit]

15+

Recommended for adolescents from the age of fifteen

Integer Examples

Logics 0.4 in

-2910×134÷(-67×(-2))=-2910

44000÷4=11000

-99×27×106=-283338

24×(354×62)=526752

-846×(-51×702)÷918=32994

Fraction Examples

Limited 0.3 fp

1/3÷19/39-77/304=131/304

Limited 2.3 fp

(7/68+11/17)÷1173/478=239/782

Complete 0.3 fn

-3117/298-15/149×217/30=-1667/149

Complete 2.3 fn

(1/4+1/4)÷1/116=58/1

Equations

-2x²+26x+280=0

46x²=73600

-84x²+3948x=0

-x²-41x+1220=0

23y×x=17112

y-x=118

140y÷30x=35

55y+44x=6490

-x-y=79

-x-y=-20

-13x×26y=38532

-20y+91x=38

Language Exercises

Russian Vocabulary 3.5

ап гей

English Vocabulary 3.5

inv stigation

Lexicon 2.5

adv nced [forward]

Infinitive 2.3

outfight [outfight]

16+

Recommended for adolescents from the age of fifteen

Equations

-29x²+580x+609=0

14x²=201600

-153x²+44370x=0

3x²+288x+6045=0

562y-64x=18440

11y×2x=5017320

132x+108y=93720

-46x+254y=95236

-y-x=-370

y×4x=146880

-100y-40x=-57560

Language Exercises

Infinitive 3.3

outsell [outsell]

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